ICQ (transcription: IC Q) is a computer program to communicate, operate an Instant Messaging, originally created by Israeli company “Mirabilis”. The program started in November 1996. The name ICQ is a play on words (homophone) and phonetic consonant with the English phrase I seek you ( “I seek you”).
ICQ was founded by Yair Goldfinger, Arik Vardi, Sefi Vigise and Amnon Amir. Enables the sending of text messages and links, conferencing, file transfers, greeting cards and more.
ICQ users are identified by numbers called UIN. They are allocated to each new user as a row (although there are rumors that there are gaps in the series). New users are given numbers more than 100 million, and the smaller (6 digits or less) have announced an auction on eBay by users who have registered during the inception of the program.
AOL acquires and Mirabilis ICQ in 1998. OSCAR protocol of AOL, ICQ used by, is private, but are designed more or less customers from third parties, including:
Ayttm – supports ICQ, Yahoo !, AIM, MSN, IRC, and Jabber
centericq – supports ICQ, Yahoo !, AIM, MSN, IRC and Jabber
Fire – supports ICQ, Yahoo !, AIM, MSN, IRC, and Jabber (for OS X)
Gaim – supports ICQ, Yahoo !, AIM, MSN, IRC, Jabber and Gadu-Gadu
Pidgin – supports AIM, ICQ, Jabber / XMPP, MSN Messenger, Yahoo !, Bonjour, Gadu-Gadu, IRC, Novell GroupWise Messenger, QQ, Lotus Sametime, SILC, SIMPLE, and Zephyr.
GnomeICU (before GtkICQ)