QQ, short for Tencent QQ, is an instant messaging software based on the Internet.

QQ has covered many mainstream platforms such as Windows, macOS, iPadOS, Android, iOS, Windows Phone and Linux. Its symbol is a little penguin wearing a red scarf. Tencent QQ supports online chat, video call, point-to-point breakpoint continuation, * * * file sharing, network hard disk, custom panel, QQ mailbox and other functions, and can connect various communication terminals.

Early development:

200 1, Tencent first integrated advertisements in QQ. Before QQ2005 Beta3, TT browser was bundled with QQ installer and installed by default. Many early third-party QQ versions (such as Caoshanhu QQ and Mu Zi QQ) were originally designed to block QQ advertisements and some unnecessary software and plug-ins, and also added many new functions to QQ.

For example, display IP address, check whether friends are invisible, etc. The third-party QQ version with the function of displaying IP address is usually called "IPQQ". For Tencent to clean up third-party QQ software, please refer to the chapter "Cleaning up third-party QQ software".