Looking for something to decorate the walls of your cubicle or office. This collection of posters draws from various sources. They can add a bit of color to your surroundings, build up your credibility, and most importantly, provide easy-to-read, easy-to-find reference information.
Microsoft offers a ton of posters if you just search the Download Center for ‘poster’. I found sorting by newest release date helps find the most relevant. Just a few interesting examples:
Windows Server 2008 R2 Feature Components
Free posters from O’Reilly including the animals, a history of programming languages timeline, Linux anatomy, and Open Source Route Map.
Gnu/Linux Distribution Timeline
Version 12.10 of this poster tracks distros as they fork off.
Fluke provides a free Ethernet Connectivity poster that you can order by mail, once you place an order you can also download a digital copy of the poster.
SysAdmin Code of Ethics
U.S Government Bookstore
Depending on what industry you work in, this poster of US Frequency Allocations: the radio spectrum chart could be very handy.