A program released by Mirablis that allows person to person communications without needing to know exactly when the other will be online. It communicates thru an ICQ Server that allows instant notification of users being online, and storing of messages, files, etc, for later delivery when they are.. Mirablis has been bought by AOL, who most people think will become the demise, as AOL has a competing, but inferior product called Instant Messanger..

Actually, ICQ uses a direct connection between users to send messages, unless you go to the Preferences dialog and specifically tell it that it should send messages through the server. And, even then, files will still be sent directly. AFAIK, you can not store files on an ICQ server.

Since nobody else could be bothered to list them, here are a few of ICQ's features:

My UIN is 708960, ICYC.

Here's my knowledge add for this issue:

Here is a small list that might be usefull to realize. I discovered it when setting up an IF-MS (Information Flow Management System) policy.

  • digital archiving (cheap, permanent, steadily growing, low usage, high in meta data)
  • permanent physical archiving --> stuff required by law (very expensive)
  • temporary physical archiving --> for: high usage reference data (very cheap, fast access, high usage, no/low meta data)
  • delayed digital interaction (very cheap)
  • delayed IRL interaction (cheap)
  • instant full contact digital face 2 face, like: Instant Messaging or video conferencing (expensive, little meta data)
  • instant low contact digital face 2 face, like: Instant Messaging (cheap/expensive, no meta data)
  • instant IRL mono/multi face 2 mono/multi face (expensive, very temporary, inefficient in knowledge management, efficient in knowledge creation, moderate/efficient meta data)
  • instant mono face 2 multi face (cheap, more permanent, moderately efficient in KM, inefficient in knowledge creation, efficient meta data)

Now understand that to work optimally from a KM perspective a company should offer ALL ways of communicating, and make it's employees efficient in choosing the right channel - this usually goes automatically if all channels are implemented efficiently and correctly; if a few channels are missing you get forced communication which is HIGHLY inefficient.

PS: The new releases since ICQ 2001 stores the UIN's on the Mirabilis servers ! Make sure you backup and trust Mirabilis when using this IM software.

ICQ is the communication standard in our office. And despite the fact that ICQ and its servers are owned by AOL, I continue to use it.

It may seem weird that ICQ is how we communicate in my company, but before you judge, take a look at my reasoning:

  • I use LICQ, a lightweight ICQ clone for Linux; all good.
  • LICQ 0.85 supports encrypted peer-to-peer messaging
  • everyone in the office is given nice Sony headphones when they start; as a result everyone listens to music when they work, making it hard to talk directly
  • since talking wastes valuable programming cycles of my brain, ICQ is a God-send; it forces people to choose their words carefully as it takes them much longer to type their message than to speak to me

The current release is ICQ 2000b Beta v4.60 Build #3278, released October 25, 2000.

I have had ICQ for several years, since close to the beginning. I know from conversations with various people that originally the numbers were assigned somewhat randomly and the fact that you had a 7-digit UIN does not necessarily render you "l33t". I originally was #5701550, but since the servers were notoriously bad at the time, they never saved any of my information so that when I finally forgot my password they refused to email it to me on the grounds that they did not have my email address on file. I was a tad miffed. Currently, that number has no info at all, although it once had my Nick of the moment.

I use ICQ to communicate with people from around the world, including people I originally met through Hardwood Hearts, Hardwood Spades, The SciFiVine (originally SciFiSites), imood, here, and various other places around the internet. I also use ICQ for the purpose of exchanging pictures, exchanging mp3s, and voice messaging. It has come a long way from the program I originally downloaded so long ago and the latest release sports a revamped User's Details window and a few fixes.

One thing particularly notable in the latest version is that the plugin options have been separated from the main program. Now, when you download ICQ, you get only the basic program. If you wish to have ICQ Voice Message, ICQ Help, or ICQ Web Front, to name a few, you will have to visit the ICQ Plug-in Center at the Mirabilis site to download those. The ICQ download is currently 5.1mb.

Unfortunately, there are some odd compatibility issues when converting the user database from ICQ99 to ICQ2000 and if you are particularly unfortunate, you may lose your entire db. This happens rarely, but when upgrading you should always backup your db in case of this so that you don't have to lose everything, although what you would do with it outside of ICQ I couldn't tell you. My db had been corrupted and I was completely unable to convert it. The loss actually freed about 148mb of space on my hard drive that had been taken up with the message history of several years.

My current UIN is 22746352, and at this moment my Nick is Neko no Aijo.

Mirabilis's ICQ is (at the risk of argument) the oldest, biggest and best instant messaging service, which spread in the early days by word of mouth, and was eventually purchased by the AOL Time Warner behemoth.

As great and useful (and secure as a wet paper bag) as the technology is, there are some minor problems with the client software.

Clearly, Mirabilis's developers (or chimps, as I like to call them) are the biggest collection of Visual Basic-reared jackasses ever to draw breath. Their client software is crammed with useless features*, and has an incredibly ugly and unintuitive interface.

An interface that, for example, doesn't use the right-click for anything apart from a message telling you to use the other button. That prints user details in grey on a grey background (and doesn't let you highlight them, or change the colours). That resizes and repositions itself stupidly whenever an OpenGL or Direct3D application does a resolution switch. That features banner ads in places where other clients don't have places. And features a barrage of crappy sounds that have to be turned off or erased to maintain your sanity.

And don't get me started on the options dialog ("look how many controls we can fit on a form!"). Why don't AOL sack these buffoons and let those fine fellows at Nullsoft (whose souls... err, company they also own) do their l33t interface-fu on it?

Thankfully, there are many alternatives available to the ICQ junkie, such as the slinky MICQ, or the highly competent Trillian.

*the SMS function is pretty cool though.

ICQ protocol wasn't published at first, but people reverse-engineered the protocol when the only client that was available for Linux was That Big, Slow, Ugly And Buggy Java Client®.

When reverse-engineered (first by Magnus Ihse), the v2 protocol turned out to be quite horrible. Apparently, the latter versions of protocol, as well, sucked similiarly but differently.

For long time, the passwords were sent unencrypted. The connections were almost always over UDP, making it (without any precautions in place against it) spoofable, hijackable, and not guaranteed to be reliable - and also difficult to deal with in places with firewalls. Also, the client developers noted the official clients were crashy when fed some bad packets...

The clients had "hooey permission bits" - you can set the permission bits all right, but the client is not required to honor them. One of these permission bits is "require authorization in order to add me to your contact list". Well, I edited my mICQ contact list and the "unaddable" users got to my contact list all right... and the users didn't even get a confirmation message that I had added them! Same thing with Everybuddy, I'm not sure if Jabber also did that...

The newer ICQ protocols have fixed the UDP problems effectively by getting rid of it and using a new, hopefully better protocol.

And since the aquisition by AOL, the new winds blow: Newest versions have apparently switched to use AIM OSCAR protocol. (thanks, fuzzie.)

(Oh: My UIN is 4291042 - I hadn't even read Douglas Adams' books yet when I first used ICQ... Though, these days I use only Jabber: wwwwolf@jabber.com.)

The latest version of ICQ - 2001b (released November 4th 2001) contains a feature which enables users to share directories on their hard-drives with users on their contact list.

This feature is quite similar to the sharing capabilities of peer to peer networks and applications such as Napster, Gnutella, KaZaA, Audiogalaxy, etc.

The only difference between these networks and the ICQ implementation is the abilty to search for the files you wish to download. It is likely that future versions of ICQ will contain this feature, and will make ICQ join the mp3 and divX piracy world, also making Mirabilis a target to legal attacks from the RIAA and similarly oriented organizations.

But even before such a search service is implemented, the broad use of ICQ may make the directory sharing feature a replacement for current 'illegal' file distribution methods such as IRC xdcc bots and fserves, FTP sites, etc.

ICQ as a name dates from Ham radio days, being an abbreviation for I Seek You. This was, and still is, used by radio operators when tentatively looking for a specific radio operator, e.g.

"Juliet Bravo this is Sierra Seven. ICQ, Over."

Although the official ICQ client is a clunky piece of bloatware with some reported problems with system stability, there are alternative programs which use the ICQ protocol, of which the following is a non-exhaustive selection, available from an internet near you:

  • A stripped-down interface (currently only using Mirabilis's server) is available on Windows versions of the Opera browser, from version 5 onwards. The whole browser package is smaller than the official ICQ client. I have found this to be quite adequate for limited use, but I use Opera anyway.
  • Miranda is an open source stripped-down Windows and AlphaNT client designed for mouseless operation.
  • mICQ is a command-line console interface vaguely modelled on mIRC for Linux, BSD, Amiga, Win32, BeOS and "some other *ixes".
  • Trillian is a skinnable freeware Windows client that also covers several other messaging protocols (AIM, IRC, etc.)
  • Linux (X) users can use licq or gicq.
  • It is left as an exercise for the reader to work out what OS AtarICQ runs under.
  • A web-based Java client can be reached at http://go.icq.com - predictably, it is only really happy running on the Microsoft Java VM but OK at a pinch otherwise; handy if you only have access to port 80 or are on a machine where you don't want to or can't install anything.

/msg me with additions, recommendations, comments whydoncha?

ICQ is a proprietary implementation of Instant Message (IM) technology. There is free implementation called Jabber - it uses open protocol based on XML and free source clients.
ICQ is closed source and it's protocol closed also. Some people have dug it out using simple network tools (such as tcpdump).
Now (feb.2002) the most recent protocol version is v8.
Older versions are not supported by Mirabilis any more. This means that older clients and free implementations of older versions (like mICQ) could work only partly or have big delays (up to days) in deivering messages.

Mirabilis fights all other icq-cmpatible implementations of clients and servers with gateways.
Still, you could get a free ICQ server - IServerd and free gate to Jabber - icqtransport.

ICQ is not a secure protocol. There was a client (I do not know it's name, it was written by someone from Ukraine) which have had ability to send messages from any UIN number you like. Also you could intercept messages for other persons and get passwords with it. Instead of securing icq's protocol, Mirabilis insist on removing the WWW page with this software and calls it illegal.

There is Perl implementation of ICQ client for Unix console - vICQ.

I jumped into the ICQ train kinda late, in 2003, when I was 14. However, I arrived early enough to appreciate it in its full glory, just before everyone switched to the evil, wicked and featureless MSN Messenger.

As I had a dial-up connection back then, I could only spend a few hours (no more than two or three) a week online, so my heart would race and fill with joy at the beautiful sound of a boat's claxon/horn that played at start up.

It's true, as many have said before, that it had loads of useless features and that the interface was pretty messy. But they were useless and messy in a good kind of way. I loved completing my profile, browsing from an endless list of interests and carefully selecting them, knowing deep in my heart that no one would look at them. I also loved the typewriter sound and the oh oh, but I admit I would hate them now.
I met lots of people, most very nice, and some that tried to show me things I hadn't seen before, using the random search function.

Some very good functionality (though I don't know for sure if it was introduced by ICQ), like sending offline messages and saving the chat history were later shamelessly stolen by MSN.

Sadly, ICQ is now a ghost network filled with bots. So I wonder why they still keep on releasing new versions of their client.
Maybe the bots are doing it, or maybe they have hope, as I do, that one day the flower will resurrect from the dead.

In 2010, a Russian company Mail.ru Group bought ICQ. In 2016 ICQ changed its design and the new ICQ 10 has been released. Now it looks like Viber. There is a version for Windows, Linux, Mac OS X, Android, IOS, Web and others. Also there is a Java version for other phones.
But only a few people use ICQ nowadays. Because Whatsapp, Skype, Viber, Facebook Messenger are more popular than ICQ. The UIN system is active, I think that it is very good. Now ICQ has video phone calls like Skype, phone calls, and messages, too.

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