TAC is an

open source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...

instant messaging Instant messaging (IM) technology is a type of online chat allowing real-time text transmission over the Internet or another computer network. Messages are typically transmitted between two or more parties, when each user inputs text and trigge ...

and chat client program written by

AOL AOL (stylized as Aol., formerly a company known as AOL Inc. and originally known as America Online) is an American web portal and online service provider based in New York City. It is a brand marketed by the current incarnation of Yahoo! Inc. ...

which uses the

TOC protocol The TOC protocol, or Talk to OSCAR protocol, was a protocol used by some third-party AOL Instant Messenger clients and several clients that AOL produced itself. Sometime near August 19, 2005, AOL discontinued support for the protocol and no longer ...

used by the

AOL Instant Messenger AIM (AOL Instant Messenger) was an instant messaging and presence computer program created by AOL, which used the proprietary OSCAR instant messaging protocol and the TOC protocol to allow registered users to communicate in real time. AIM wa ...

system. It is written in Tcl, and is a command line client. It is a command line version of the GUI

TiK Tik or TIK may refer to: *Tik (dance), a Greek dance *TIK (band), a Ukrainian folk rock band *Tik (methamphetamine), a drug colloquially known in South Africa as "tik" *Tiu Keng Leng station, Hong Kong, station code * TiK, a messaging program *Tik ...

client which is written in

Tcl TCL or Tcl or TCLs may refer to: Business * TCL Technology, a Chinese consumer electronics and appliance company ** TCL Electronics, a subsidiary of TCL Technology * Texas Collegiate League, a collegiate baseball league * Trade Centre Limited ...

/ Tk. Developing of TAC and

began in 1998. The software is no longer developed by AOL since 1999. Several independent developers have released some new versions of the software. However, at the time of this writing no new versions had been released for several years.

Meaning of acronym

The name TAC is said to stand for "TAC, another client".

External links

TAC Independent Development Website
AOL Free software programmed in Tcl Instant messaging server software {{Network-software-stub