Compaq
Compaq offerings include presario notebook and laptop pcs, desktops, and pc accessories.
http://www.compaq.com/
Hewlett Packard
Official hewlett-packard site - buy or learn about hp printers, laptops, computers, digital cameras, servers, storage, networking, software, enterprise solutions & more.
http://www.hp.com/
Microsoft
Microsoft
http://www.microsoft.com/