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Wireless Network Connectivity
Ethernet Network Connectivity
Bittorrent
Microsoft Office XP, 2003, 2007
SD Card Slot
USB Ports
Audio
DirectX
OpenGL
Plug and Play
Themes (signed & unsigned)
Paint
Notepad
Calculator

Printing--decreases RAM usage; eliminates the spooler service
Multiple User Accounts--speeds up boot time, property of minlogon.exeWindows
Networking--property of minlogon.exe
16 bit application support--decreases install size
Windows Image Acquisition--decreases RAM usage. prevents direct connection of cameras to the pc via a usb or firewire cable. Note you can upload photos using a USB card reader or built is SD card slot.
Windows Media Player 9--decreases install size. I recommend VLC player by VideoLAN.org
Internet Explorer 6--Plagued by security and nuisance attacks. A Mozilla Firefox 2.0.11 setup file is provided on the ISO/CD
VPN--decreases install size
Windows Firewall--decreases install size, increases RAM. It is my belief that there are better third-party firewall software packages avaiable.