Description
App Information Avci Beğeni Adresi
- App NameAvci Beğeni Adresi
- Package Nameunal.avcibeeniadresi
- UpdatedDecember 27, 2016
- File SizeUndefined
- Requires AndroidAndroid 4.0.3 and up
- Version1.0
- DeveloperAvcı Bilişim
- Installs1,000 - 5,000
- PriceFree
- CategoryTools
- Developer
- Google Play Link
Avcı Bilişim Show More...
Avci Beğeni Adresi 1.0 APK
instagram takipçi hilesiÖZELLİKLERİMİZ ;*Ücretsiz kazanabilirsiniz.-- Takipçi kazanabilirsiniz.-- Ücretsiz beğeni kazanabilirsiniz.-- Sizi takip etmeyenleri bulup unfollow yapabilirsiniz.-- İnsta Takipçi Arttır-- İnsta Beğeni KazanNot : İnstagram kuruluşu hesabınızın şifresiniotomatikyenileyebilir.Bunun hesabınızın çalması ile bir alakasıyoktur.e-posta adresinize girerek şifrenizi yenileyebilirsiniz.Her Gün Düzenli Olarak Yenilenmektedir....instagramfollowerstricksOur FEATURE;You can win free.- Followers can win.- Free admiration can win.- You can find and unfollow those who do not follow you.- Followers man and a Increase- Received a man and winsNote: Your Instagram account of your accountpasswordautomatically yenileyebilir.b organization has nothing todo withthe play. You can reset your password by entering youre-mailaddress.Each day is renewed regularly ....
Beğensinler Mobil 2.0 APK
Kimseyi takip etmezsiniz!Her gün 2400 BEĞENİ - 240 TAKİPÇİ - 20 YORUM Kazanırsınız.Kredileriniz 2 saatte bir yenilenmektedir.Her 2 saatte bir ücretsiz 100 Beğeni kredisiHer 2 saatte bir ücretsiz 20 Takipçi kredisiHer 5 saatte bir ücretsiz 5 Yorum kredisiYou will notfollowanybody!Every day 2400 APPRECIATION - 240 FOLLOWERS - 20 REVIEWSyouwin.Your credit is renewed every 2 hours.Every 2 hours free 100 Likes loanEvery 2 hours, a free 20 Followers loanA free credit every 5 hours 5 Comments
Similar Apps Show More...
Ücretsiz insta takip beğeni 1.2 APK
Gittikçe trendi artan İnstagram sosyalmedyahesaplarında sizlerde kısa zamanda fenomen olmak istermisiniz?Artık herkesin binlerce takipçisi olduğu bu platformdaonlara hızlıbir şekilde ulaşmak için yapmanız gereken güvenli birşekildeİnstagram takipçi satın almanız olacak. Bu imkanlar ilesizlerdeçok daha popüler görünecek ve böylelikle insanlarınilgisiniçekerek gerçek takipçiler edinmeye başlıyor olacaksınız.Sizlerde İnstagram beğeni ile de bunu destekleyecek ve sadeceçokfazla takipçisi olan ama hiç beğenisi olmayankişilerdenarınacaksınız. Böylelikle size bakanlar bu takipçilerinzaten nekadar gerçek olduğunu anlıyor olacaklar. Hem takipçisayınızıarttıracak hem de fotoğraflarınız ya da videolarınız içinbeğeniyaptırarak, hesabınızı çok daha güçlü birhalegetirebilirsiniz.Dolayısı ile sizlerde İnstagram takipçi kasma hakkında tümhileleriöğrenmek ve konu hakkında bilgi edinmek için hemenuygulamamizagiriş yaparak profilinize takipçi çekmeyebaşlayabilirsiniz.İstediğiniz kadar takipçi sayısına kadaruygulamada yeralabilirsiniz. Bu profiliniz gerek kendi hayatınızdankesitlersunabilir, gerek satış yaptığınız bir profil sayfasıolabilir ya dainsanları güldürmeye düşündürmeye yönelik bir sayfaolabilir.Sayfanızın hangi alana hitap ettiğinin hiç önemi yok. Önemliolansayfanızı çok daha kısa zamanda istediğiniz takipçi sayısıilebuluşturmak olacak. Dolayısı ile sizlerde ben de bu platformdayeralmak istiyorum ve başarılarımı çok daha kısa süredekanıtlamakistiyorum diyorsanız o halde İnstagram takipçi sistemiile işlemihızlandırabilirsiniz.increasing trend inmyinstagram social media accounts you as soon as you want to bethephenomenon? Now that all the thousands of followers of theplatformsafely you need to do to reach them quickly will be tobuyInstagram followers. These capabilities will look much morepopularand thus will be pulling for you with the people's interestisstarting to gain real followers.I'm with you on instagram likes to support it, and only withalot of followers, but you will not like the removal of anyperson.Thus, you will be facing up to what you already understandthat thetrue followers of these. Your photo will both increase yournumberof followers or by building appreciation for your video, youcanbring your account to become a lot more powerful. Thus you learn about all the tricks in my instagram followersmusclejust by logging into our application and to learn more aboutthetopic you can start attracting followers to your profile.Applyingto the number of followers you can get involved as much asyou want.This profile you need can offer a glimpse into your ownlife, youneed a profile page could be your sales page for a laughor tosuggest to people. No matter what field that appeal to your page.Theimportant thing is that you want your page will be in amuchshorter time to meet with a number of followers. Therefore, Iwantto get in the first place on this platform and you say I wanttoprove my success in a shorter period of time that can expeditetheprocess with state Instagram follower system.
İnstakipcin 1.0 APK
ÖZELLİKLERİMİZ ;*Ücretsiz kazanabilirsiniz.-- Takipçi kazanabilirsiniz.-- Ücretsiz beğeni kazanabilirsiniz.-- Sizi takip etmeyenleri bulup unfollow yapabilirsiniz.-- İnsta Takipçi Arttır-- İnsta Beğeni KazanNot : İnstagram kuruluşu hesabınızın şifresiniotomatikyenileyebilir.Bunun hesabınızın çalması ile bir alakasıyoktur.e-posta adresinize girerek şifrenizi yenileyebilirsiniz.Krediler Her Gün Düzenli Olarak Yenilenmektedir....Our FEATURE;You can win free.- Followers can win.- Free admiration can win.- You can find and unfollow those who do not follow you.- Followers man and a Increase- Received a man and winsNote: Your Instagram account of your accountpasswordautomatically yenileyebilir.b organization has nothing todo withthe play. You can reset your password by entering youre-mailaddress.Loans are renewed regularly every day ....
Free Instagram Likes tips 1.2.6 APK
Have you imagined becoming popularonInstagram?Have you desired 5000 real instagram followers &10000likes?All you need is this app for instalike & instafollow**********************************TIPS HIGHLIGHTS**********************************Hot insta hashtags will bring more high quality followers andlikesfor you>> rule likeback : Like other’s photos or videos andthenthey may like back.>> rule followback : Follow others, when they see yourfollow,they will follow back too>>rule Followers boost tag : Use more tags likelike4like,follow4follow, to attract others to like you and followyou. Andalso #l4l (Like for like), #tagforlikes and #followback,#FF(FollowFriday), #instafollow,>>Like hundreds of random photos from people in yourtargetaudience. This strategy will bring you 5 followers every 100followothersOnly instafollowers, instalikes, real likes, real followersplusare guaranteed. Download Free instalikes, Free instafollowerstodayand enjoy this amazing app!Get real instagram likes, instagram followers, video viewstips,be popular right now.
Unfollower for Instagram Pro 2.1 APK
The best cleaner tool for Instagram! Do you use like or followerapps and get tons of Instagram followings just to earn coins? NowInstant Cleaner helps you mass clean whatever you don't need withjust one tap. This app very helpful for Unfollow your followinglist. Easy to use and bulk unfollow just one tap! Features: - Bulkunfollow users. Disclaimer: This app and its makers are notsponsored or endorsed by, or affiliated with, Instagram,Inc.
Followers + Analysis for IG 1.1.4 APK
Found some interesting profile on Instagram?Wanna know who always commented on your posts? With this app notonly you can get more insight about your profile, it also canunlock many secret of your friends. Leave no stone unturned. Get itnow!With this Followers Insights, you can easily track your followers(your gained and lost followers, mutual friends and fans).It's fast, accurate and extremely intuitive.*** Followers Tracker lets you know:How many new followers you have got?How many old followers you have lost?Who viewed your profile recently?Who is your secret admirer?Who blocked you? Who is ghost follower?Who you liked but not following?What's the tip to get more instagram followers and likes?Who tagged you?What’s more! You can even know when people like you & what theyhave commented on your posts.With our app, you can successfully clean your account and know moreabout what other users like/dislike, you will be able to get morefollowers & likes easily. That’s right what we aim to help youwith. Download it and experience the most powerful Instagramanalysis tool. Don’t forget to share it to your friends if youreally like it :)Note: You need to have an Instagram account to use this app.
Real Followers Fast Likes 1.6.8 APK
Discover who unfollowed you on Instagramandwho is not following you back, track gained and lostfollowers,find mutual friends, view fans plus more ,Use InstaFollow app to effectively manage your Instagram accountandget so much insight. It's fast, accurate andextremelyintuitive.Free Features:- Detect and keep track of new instagram followers+unfollowers- Show non-followers, mutual friends and fans- Follow/unfollow users- View user profiles- Support accounts up to 10,000 usersEngagement (Optional Purchase):-- Ghost Followers-- Secret Admirers-- Best Followers-- Top Supporters, Likers and CommentersUser Insight (Optional Free):-- Sort Users Based on Activity Level, PopularityandLikabilityMedia Insight (Optional Free):-- Show Most and Least Popular/Liked/Commented PicturesandVideoSo next time you asked yourself 'Who unfollowed me on Instagram?'or'Who are my ghosts?', just use Instagram Follow. It willanswerthose question plus more. You'll like it instantly.If you get featured on InstaFollow, you can gain more followersveryquickly.Note: You need an Instagram account to use this app!!
Mass Cleaner for Instagram 1.1.1 APK
If you’re reading this, I’m guessing you arebeing annoyed with numerous inactive followers and ghosts. Wait,what? More than these? Our Insta Cleaner helps you mass cleanwhatever you don't need with just one tap. And here's a bonus:Insta Cleaner is FREE!Insta Cleaner is the perfect tool to mass unfollow forInstagram, bulk block ghosts or inactive followers, bulk deleteposts and unlike previously liked photos or videos.Our Unique features:* Batch unfollow usersUnfollow inactive users and follow more interesting users.* Mass block ghostsBlock ghosts to release your instagram accounts.* Mass delete postsDelete the posts you don’t want to show in future.* Mass unlike postsSupport batch unlike, which will free your fingers.* Quick selectionClean the accounts and you will get more high quality followers andlikes. We want to THANK all our users who are already using ourMass Cleaner for Instagram! DOWNLOAD it now and see how muchsurprise we bring to you!
Tools Top Show More...
ENGIE - Convivium APK
Convivium, l’applicazione ENGIE pensata per semplificare la vitanelcondominio! Convivium gestiste, per l’amministratore e icondòmini:• SEGNALAZIONI TECNICHE: facilita la gestione dellerichieste diintervento, aggiornando i condòmini e l’amministratorein temporeale sullo stato di avanzamento • MESSAGGIAMMINISTRATORE:semplifica la comunicazione tra condomino eamministratore suscadenze, assemblee e molto altro • ARCHIVIODOCUMENTI: raccoglie idocumenti importanti del condominio, comeverbali e preventivi •CONTATTI UTILI: gestisce la rubrica con icontattidell’amministratore, dei condòmini e dei fornitori delcondominio,come l’idraulico e l’elettricista • BACHECA SOCIAL:crea unacommunity tra i condòmini per scambiare informazioni eavvisi utiliL’applicazione è dedicata agli amministratori chegestisconocondomini clienti ENGIE e a tutti i loro condòmini.ACCESSOCONDÒMINI: per accedere è necessario seguire la proceduradiregistrazione condòmino, indicando come codice condominio ilCodiceFiscale del condominio ACCESSO AMMINISTRATORI: per accedereènecessario utilizzare le credenziali impostate per lapiattaformaweb Si segnala che la grafica e la navigabilità dell’appConviviumsono ottimizzate per la navigazione da smartphone. Ituoisuggerimenti e le tue segnalazioni sono importanti per noi.Perqualsiasi necessità puoi chiedere supporto scrivendoall’indirizzoemail [email protected], saremo felici diaiutarti.
NetLoop VPN 5.0.4 APK
NetLoop is formerlyknownasSimpleAndroid ServerThis app contains a Proxy Server and aFreeVPN.The VPN is not a full featured VPN. it is notprovidedforsecuritybut for tunneling purposes.if you are using NetLoop's proxy serveroptionpleasemakeremove any existing proxy server address inyourdevice'sAPNsettings. Failure to do this will cause Some ofyourapps not togothrough the VPNVPN features:• HTTP request Compression.•Ability to modify TCP connection parameters.• Ability to use hotspot over VPN ( Requires root )•Ability to use multiple concurrent connections to theVPNserversforthe best Network usage experienceLocal server features:•modify outgoing requests.•specify alternate proxy servers to send a request through•provide alternate headers and ability to stripheadersfromincominghttp responses•ability to choose number of connections to be maintainedbytheapp(good for power management)•ability to share configurations throughanyfiletransfermethod.•System wide proxy serviceif you are to use this app with the proxyserverfeature,makesure that the device's proxy serverfeatureisdisabled:.to use a received config.json fileasthecurrentsetting:•locate the received file using any file manager ofyourchoice•open the share menu of the file manager and select"usefileasconfig"OR•Launch NetLoop and use Load ConfigThe Profiles Feature lets youeasilyswitchbetweenconfigurations when using NetLoopEnjoy!!.
FREE WiFi Password Recovery 4.3 APK
Need to re-connect your new device to WiFinetwork, but forgot your password? Want to share a WiFi password ofrandom characters with your friend?Use FREE Wifi Password Recovery to backup all WiFi passwords onyour device, and restore it when you need them with just one click!Share with friends through SMS or email. Yes, just that easy!FREE Wifi Password Recovery features:■ LIST, BACKUP & RESTORE all network's (WiFi) password savedon your device!■ Show SSID and Password on fullscreen (for easy viewing andsharing with others)■ Copy WiFi Password to Clipboard (to be able to pasteanywhere)■ Show QR Code (to another device scan and access thenetwork)■ Share password through SMS or EmailPlease Note that FREE Wifi Password Recovery:① only works on rooted devices (needs super-userpermissions).② is not a WiFi password cracker. NOT intended to crack WiFinetworks.③ needs previous access to WiFi networks with your device toretrieve passwords.❐ Please understand that FREE Wifi Password Recovery is a freeapp and contains ads to support develop cost. For ads free app, wehave a paid version - check out in Play Store:http://goo.gl/elnAHS❐ Why FREE Wifi Password Recovery only works on a rooteddevice?Because your device stores WiFi passwords when you connect to a newWiFi network. You are not able to access the passwords and retrievethem unless you have super-user permissions. Checkout here for moreinformation on root: http://www.androidcentral.com/root❐ Please don’t hesitate to contact([email protected]) for any issues you may have; and dogive us 5 stars if you like us! Thanks & enjoy!
XAPK Installer 1.4 APK
Say goodbye to Android APK OBB Installing error problem, XAPKInstaller makes that easier and faster than ever.• Scan and preview all .apk file on your phone and SD Card• Delete or install APK, XAPK ( APK with cache data or obb file)automatically• Download XAPK, APK free online with your Android phone andtabletXAPK Installer for PC is available that allows you to install.apk files from Windows XP, Vista, 7, 8. 8.1 to Android devices.Learn More: http://apkpure.com/apk-install.htmProblems downloading or installing APK with XAPK Installer? Seehttp://apkpure.com/xapk.htmStill need more help? Please tell us more about the issue onFacebook. https://www.facebook.com/apkpure
360 Security -Free Antivirus,Booster,Space Cleaner APK
Free Security Protection, Speed Booster andJunk Cleaner for Android PhoneTrusted by 200 million users, 360 Security is the #1 all-in-onepower cleaner, smart speed booster and antivirus app that optimizesyour background apps, memory storage, junk files & batterypower, keeping your device safe from virus and trojan.Download this powerful super cleaner master optimization &security app that’s intuitively designed to protect your mobilelifestyle in just ONE tap, making phones run like they're brand newall the time.Why 360 Security is a MUST-HAVE app?★It’s an Effective Speed Booster & Smart Cleaner-Lacking spacefor new apps and photos? Just clean app caches and junk files,boost your phone with ONE click!★It’s a Smart Battery Saver- Battery draining quicker than ever?Kill redundant apps that drain your battery and extends batterylife!★It’s a Virus Remover for android -Worried about viruses orphishing? 360 Security’s top antivirus solution makes sure yourdevice is free from malware, vulnerabilities, adware andTrojans!------------------------------------------Highlights of 360 Security►Security & AntivirusScan installed apps, memory card content and new appsautomatically. 360 Security’s latest protection technologiesagainst viruses, adware, malware, trojan and more.►Junk File CleanerDelete all types of junk files (system cache, image cache, videocache and advertisement cache) to free up the storage space.►Speed BoosterBoost speed to improve the performance and RAM of your phone, boostyour games to make them run smoothly.►CPU Cooler MasterIntelligently saves your device’s power by knowing when toautomatically trigger 360 Security’s Battery Saver feature and makeyour phone stay with durable power and never overheated.►Anti-theftAn all-in-one anti-theft solution, should you lose your belovedphone. A suite of features including, Erase, Locate, Alarm &Lock can assist you with retrieving the lost device and protectingpersonal data. You can trigger remote features via our webinterface at http://findphone.360safe.com►PrivacyPrivacy & App Lock – Prevent data on the device such asFacebook, Instagram, Whatsapp, Snapchat, photo albums and otherimportant & private documents from falling into the wronghands.►Intruder SelfieInstantly snap a photo of anyone who breaking into your apps andrecord the date & time in App Lock for check.►Fingerprint LockUnlock screen quickly and easily with your fingerprint if yourdevice has the fingerprint sensor, no fear of forgetting pattern orPIN code any more.►Real time protectionScan installed apps & local APK files and also monitor eachinstallation process, provide the best payment & shoppingsecurity.Protect your mobile device with 360 Security, a top of the linefree security app designed to protect your Android phone againstthe latest virus, malware, system vulnerabilities & privacyrisks. This super speed cleaner also clears application caches andjunk files from your system, increases the available storage spaceon SD card and boosts your Android phone for free.------------------------------------------360 Security is available more than 35 languages: English,Português(Brasil), Português(Portugal), Español(España),Español(Latinoamérica), Pусский, हिन्दी, ไทย, Bahasa Indonesia,Türkçe, Tiếng Việt, 中文(简体), 中文(繁體), Bahasa Melayu, 日本語, Deutsch,Français, 한국어, Italiano, Čeština, Nederlands, Svenska, Polski,Suomi, Română, Ελληνικά, Magyar, Hrvatski, Dansk, العربية, हिन्दी(भारत), Filipino / Tagalog, فارسی, Українська, Lietuvių (Lietuva),Slovenščina (Slovenija), Norsk, ភាសាខ្មែរ (កម្ពុជា), اردو زبان,etc.► Read in app permissions and usage here: ►http://goo.gl/3a2mCdWe would like to hear from you:Like us on Facebook:https://www.facebook.com/360safecenterJoin us on Google Plus Community:https://plus.google.com/communities/109670671299307805270
Undeleter Recover Files & Data 5.0 APK
Scan for and recover deleted files from memorycards and internal storage on rooted* devices.Without a jailbreak/root* access, Undeleter can only scan appcaches for images. READ BELOW FOR INFO ABOUT ROOT.For free, the app will restore all supported image file typesand all types of data, including SMS, call logs and WhatsApp orViber conversations. It will also shred and secure delete.Unlock it to recover other supported file types, remove ads andenable background scanning.*ROOT/SUPERUSER PERMISSIONS require that you modify theoperating system on your device, visit this website for moreinformation: http://www.androidcentral.com/rootApp caches can contain images that would not otherwise bediscoverable: you may find photos that were shared with you onsocial media but you never opened, or lower quality copies ofimages you have now or have deleted in the past. They may alsocontain images that have been preloaded by your browser or otherapps on your device - even images of people you don't know. Theycan be filtered out using "Hide extant files".File types: Journal scanning can discover files with anyconceivable extension. Essentially these files are still on yourvolume with their data in allocated sectors. Journal scan is onlyavailable on EXT4 and derived file systems.Deep scan heuristically scans for and recovers the following typesof files: BMP, JPEG/JPG, PNG, MNG, JNG, GIF, MP4, AVI, MKV, MP3,OGG, OGM, WAV, FLAC, AMR, MP4A, PDF, SXD, SXI, SXC, SXW, ODT, ODG,ODS, ODP, DOCX, XLSX, PPTX, ZIP, JAR, APK, EPUB.Data scanning is available for a select number of apps, includingthe system phone and SMS applications. Data will be recovered inthe form or HTML files for WhatsApp and Viber, as we cannot mergethird-party catalogs.Shred/secure delete: Files found on free disk areas can be erasedpermanently in bulk using the Shred function. You can also use thesystem-wide Share menu to securely erase files directly through anyother app, for example by opening the gallery, selecting a numberof images, pressing the Share button and selecting Securedelete.ACCOUNT - needed for Google Drive and Dropbox uploadCALL/SMS - needed for app data scanner - deleted SMS and calllogsLOCATION - for ads
Security Master - Antivirus, VPN, AppLock, Booster APK
The original CM Security upgraded to thewhole new Security Master Antivirus&VPN(by CM, Cheetah Mobile)and redefined the scalp of Phone Security: protects not only yourphone but also your privacy. Instead of providing all the popularfeatures, Security Master Antivirus&VPN(by CM) introducedIntelligent Diagnosis to detect your phone status and advise neededsolution, including Antivirus, Junk Clean, and Phone Booster(Battery Saver, and CPU Cooler) in time. Furthermore, westrengthened the protection of privacy by creating a shield for allonline activities through SafeConnect VPN.★SafeConnect VPNSecurity Master Antivirus&VPN(by CM) presents the mosteasy-to-use free VPN, proxy & unblock solution. Apart fromother VPN, SafeConnect VPN partners with “Hotspot Shield Free VPNProxy” and was designed for everyone. SafeConnect VPN establishes asecured cyber environment as you need to block out hackers. WithSafeConnect VPN, you can apply virtual location to enhance securityand freely access favorite contents. Security MasterAntivirus&VPN(by CM) now protects not only your device, but theprotection extends to online data transmission to prevent leak ofonline banking information, private messages, and browsing history.(Will be available worldwide soon.)★Intelligent DiagnosisOur famous big button design upgraded to intelligently diagnoseyour most needed solution. All solutions to keep your phone safe,clean, and optimized like a new one, including battery.Antivirus - Security Master Antivirus&VPN(by CM) equips thecertified #1 antivirus engine. It detects 100% of virus &malware by customized scan and removes virus & malware. Itprotects phone and also your personal information against malware,spyware, and hackers.Junk Clean - Phone stores junk files automatically from time totime. Security Master Antivirus&VPN(by CM) detects this issueand frees storage when needed. One tap to clean cache & junkfiles at once. The smartest way to clean and optimize phone.Phone Boost, Battery Saver, and CPU Cooler - Your phone can nothave the best performance if it stays at a high temperature or highmemory usage. Especially when charging battery and playing games,it watches out phone & battery and keeps your phone cool, fast,and saves more battery life.★Message SecurityWorry about others peeping your message notifications? SecurityMaster Antivirus&VPN(by CM) hides notifications timely toprotect your privacy by Message Security. It gathers all chatnotifications into one and makes them easier to read &manage.★AppLockSecurity Master Antivirus&VPN(by CM) protects the privacy ofapps by AppLock. You can lock anything you want to protect, such asBluetooth & Wi-Fi switches, incoming calls, recent apps,settings, photos, WhatsApp, or any apps you choose. Furthermore,the preview of notifications can be also locked so that no one cansee which apps you are using or who you are chatting with.With Applock, you can lock apps with a pattern, PIN code, orfingerprint. Fingerprint lock is supported on Samsung or Androiddevices 6.0 and above that are equipped with fingerprint sensors.You can also customize the re-lock time to re-lock at device screenoff so that no need to unlock each time you launch an app.Intruder Selfie - Security Master Antivirus&VPN(by CM) protectsapps privacy from snoopers. If someone tries to unlock your appwith a wrong password, the photo of the intruder will automaticallybe taken and the intruder alert will be sent to you by e-mail. Itkeeps your phone safe and further tells who the intruder is.Disguise cover - Security Master Antivirus&VPN(by CM) disguiseslock screen so that no one is aware of you are using AppLock whilekeeping your secret & privacy safe. You can protect yourprivacy without your parents, partner, or children knowing.Theme - You can choose style of lock screen from hundreds ofAppLock themes or customize with your photos.