c't – (magazine for computer technology) is a German computer magazine, published by the Heinz Heise publishing house. Originally a special section of the electronics magazine elrad, the magazine has been published monthly since December 1983 and biweekly since October 1997. A Dutch edition also exists which is published monthly. In addition, since 2008 a Russian licensed-title version named is published in Moscow.
The magazine is the second most popular German language computer magazine with a sold circulation of about 315,000 (; printed circulation: 419,000). With 241,000 subscriptions it is the computer magazine with the most subscribers in Europe.
c't covers both hardware and software; it focuses on software for the Microsoft Windows platform, but Linux and Apple Computer are also regularly featured. The magazine has a reputation of being very thorough, although critics claim that the magazine has been "dumbed down" in recent years to accommodate the mass market.
One of the numerous projects c't initiated is the Offline Update, a set of scripts to download Microsoft updates, combine it with an install script, and create a CD image. With Offline Update burned to a CD or DVD, a technician can update Windows 2000/ XP/ Vista and Microsoft Office 2003/2007 without an Internet connection. This is especially useful for people with no or slow Internet connections, or not exposing a vulnerable system to the Internet.
A sister magazine, iX, focuses on topics for IT professionals.