Editing ICQ (section)

===Development history===
*'''ICQ 99a/b''' the first releases that were widely available.
*'''ICQ 2000''' incorporated into ''Notes'' and ''Reminder'' features.
*'''ICQ 2001''' included server-side storage of the contact list. This provided synchronization between multiple computers and enforced obtaining consent before adding UINs to the contact list by preventing clients from modifying the local contact list directly.
*In 2002, [[AOL Time Warner]] announced that ICQ had been issued a United States [[patent]] for instant messaging.
*'''ICQ 2002''' was the last completely advertising-free ICQ version.
*'''ICQ Pro 2003b''' was the first ICQ version to use the ICQ protocol version 10. However, ''ICQ 5'' and 5.1 use version 9 of the protocol. ''ICQ 2002'' and ''2003a'' used version 8 of the ICQ protocol. Earlier versions (''ICQ 2001b'' and all ICQ clients before it) used ICQ protocol version 7.
*'''ICQ 4''' and later '''ICQ 5''' (released on Monday, February 7, 2005), were upgrades on ICQ Lite. One addition was Xtraz, which offers games and features intended to appeal to younger users of the Internet. ICQ Lite was originally an idea to offer the lighter users of instant messaging an alternative client which was a smaller download and less resource-hungry for relatively slow computers.
*'''ICQ 5''' introduced [[Skin (computing)|skins]] support. There are few official [[Skin (computing)|skins]] available for the current ICQ 5.1 at the official website; however, a number of user-generated skins have been made available for download.
*'''ICQ 6''', released on April 17, 2007, was the first major update since ICQ 4. The [[user interface]] has been redesigned using [[Boxely]], the same rendering engine used in [[AIM Triton]]. This change adds new features such as the ability to send IMs directly from the client's contact list. ICQ has recently started forcing users of v5.1 to upgrade to version 6 (and XP).  Those who do not upgrade will find their older version of ICQ does not start up.  Although the upgrade to version 6 should be seen as a positive thing, some users may find that useful features such as sending multiple files at one time is no longer supported in the new version.  At the beginning of July 2008, a network upgrade forced users to stop using ICQ 5.1 – applications that identified themselves as ICQ 5, such as [[Pidgin (software)|Pidgin]], were forced to identify themselves as ICQ 6. There seems to be no alternative for users other than using a different IM program or patching ICQ 5.1 with a special application.
*'''ICQ 7.0''', released on January 18, 2010. This update includes integration with [[Facebook]] and other websites. It also allows custom personal status similar to [[Windows Live Messenger]] ([[MSN Messenger]]). ICQ 7.0 does not support [[traditional Chinese]] on standard installation or with the addition of an official language pack. This has made its adoption difficult with the established user base from Hong Kong and Taiwan where traditional Chinese is the official language.
*'''ICQ 8''', released on February 5, 2012 – "Meet the new generation of ICQ, Enjoy free video calls, messages and SMS, social networks support and more."
*'''ICQ 10.0''', released January 18, 2016. Final update was 10.0 Build 46867, released on May 27, 2022.<ref>{{cite web|url=http://www.filehorse.com/download-icq/old-versions/|access-date=June 30, 2022|work=File Horse|title=ICQ}}</ref>