Internet, Networking, & Security Home Networking The Full Rundown of Instant Messaging or 'I.M.' AIM, MSN Messenger, ICQ, Google Talk, and Others... By Paul Gil Writer Paul Gil, a former Lifewire writer who is also known for his dynamic internet and database courses and has been active in technology fields for over two decades. our editorial process Paul Gil Updated June 24, 2019 Tim Robberts/Getty Images Home Networking The Wireless Connection Routers & Firewalls Network Hubs ISP Broadband Ethernet Installing & Upgrading Wi-Fi & Wireless Tweet Share Email "IM" – short for “instant messaging” – is a real-time communication service between desktop computers. IM has evolved from the public online chat rooms of the 1990's and 2000's, and become quite sophisticated and very common. IM is even used as productivity software in many companies. Some of the big IM players include Microsoft Lync, Trillian, Brosix, Digsby, AIM, Gchat, and Nimbuzz.IM desktop software works somewhat like email and smartphone text messaging, but with the speed of a private chat room. Both parties are online at the same time, and they "talk" to each other by typing text and sending small pictures in instantaneous time. How It Works IM is based on special small programs that two separate people install, and those programs connect to beam typed messages to each other. This special software allows you to message your online friends in other rooms, other cities, and even other countries. The software uses the same cables and network as any web page or email connection. As long as the other person has compatible IM software, IM works very well. Some IM tools even have "you've got mail" capability, where you can send messages while the other person is offline, and they retrieve it later like email. IM at Work Very few companies can forbid employees from using IM though it can be a distraction to employees. Thousands of people every day steal time away from work to chat with their friends and co-workers on their screens. On the upside, some organizations do legitimately use this social tool to communicate, like receptionists talking to their bosses on-screen while simultaneously speaking on the phone. Factory workers who wear ear protectors can see on their screen when their supervisor needs them on the other side of the factory floor. Productivity apps like Slack have changed the way people work and are a great resource for teams to communicate while working remotely. Levels of IM Sophistication Some IM products are bare-bones, that operate essentially as text messages. Other IM systems offer advanced options that let you do more than send text messages. It is possible to share photos, send and receive computer files, carry out web searches, listen to the internet radio stations, play online games, share live video (requires webcam), or even place free PC-to-PC calls worldwide.