*NIX
86-DOS

Access path
ACL
Active desktop
Active directory
Active Window
Add or Remove Programs
Add/Remove Programs
Aero
AfterStep
AIX
Apple DOS
Apple menu
Aqua
ASR
Association
Autoexec.bat
Autoplay

Background
Balloon
BeOS
Black Screen of Death
Blue Screen of Death
Bourne shell
BSD
BSOD
BOMB
Boot sector
Boot volume
Bootmgr
Bootstrap loader
Button

Cab
Cacls
Cascade
CD
CE
Chevron
Child
Clipboard
Close
Command button
CLSID
Command interpreter
Command key
Command line
Config.sys
Control panel
Cooperative multitasking
CUI
Cursor

Daemon
Desktop
Device Manager
Dialog box
Directory
Disk operating system
DLL
Documents
DOS
Double-headed arrow
Dr. DOS
Drop shadow
Dual boot

EFS
Enhanced Mode
Epoch
ERD
ESCD
Executable file
Explorer
External command

Fatal exception
File
File manager
File menu
File name
File system
Find Fast
Finder
Folder
Fork
Fstype

GDI
General Protection Fault
GNOME
Goobuntu
GPF
Graphic User Interface
GUI
GUID

HAL
Hard link
HFS
Hibernate
Hidden files
Hierarchical file system

IBM DOS
Icon
Inactive window
INF
Initial Program Load
Inode
Install
Internal command
IOS
IPL
IRQ holder for PCI steering
IRQL

Journal
Journaling file system

KDE
Kernel
Korn shell

Linux
LiveCD
Load
Logical device
Long file names
Longhorn

Mac OS
Mach kernel
Main
Maximize
Menu
Menu bar
Menu-driven
Microsoft diagnostics
Minimize
Mnemonic
Mouse pointer
MS-DOS
Msconfig
Msinfo32
MUI
Multi-user system
Multitask
My Documents
My Computer
MVS

NEXTSTEP
Non-pre-emptive multitasking
Non-windows application
NOS
Notification area
NTLDR

Object-oriented interface
Open Apple key
Operating environment
Operating system
OS/2
OSR2
OSRI

Parent
PC DOS
Plumbing
PM
PNP
Pop-up menu
POSIX
Preemptive multitasking
Prefetch
Presentation manager
Program and Features
Program files
Program group
Program manager
Prompt
Push-button

Quick launch

ReadyBoost
Real-time operating system
Recovery console
Recycle bin
Registry
Reinstall
Reserved words
Resize
RTM

Sad Mac
Safe mode
Scroll
SE
Second edition
Separator
Service Pack
Shared directory
Shell
Sizing handle
Shortcut
Slipstreaming
SP
Spin box
SSP
Start button
Startup application
Startup folder
Subdirectory
Submenu
SuperFetch
SUID
Swap file
Symbolic link
Sysedit
Sysgen
System
System.ini
System 7
System32
System file
System folder
System information
Systray

Task
Task list
Task manager
Task switching
Taskbar
Temporary directory
Temporary file
Three finger salute
Tiling
Title bar
Toolbar
Tooltip
TOPS
TOS
Trash
TSR
TweakUI
Tux

Ubuntu
Unformatting
Uninstall
Unix
User interface
UUID

Variant
VBR
Virtual machine
Vista

Wallpaper
Wfw
WGA
Widget
WIMP
Win.com
Win.ini
Win32
Win3x
Win9x
Window
Windows
Windows 2000
Windows 2k
Windows 3.0
Windows 3.1
Windows 3.11
Windows 3.x
Windows 7
Windows 8
Windows 95
Windows 95B
Windows 98
Windows 9x
Windows Aero
Windows Azure
Windows CE
Windows DOS session
Windows for Workgroups
Windows for Workgroups 3.1
Windows for Workgroups 3.11
Windows key
Windows ME
Windows NT
Windows PE
Windows Registry
Windows Theme
Windows Vista
Windows XP
Wine
Winoldap
Winpopup
WinSE
Workplace shell
WOW

X-Window
XENIX
XP
XPM