O

objects, removing from pictures, 608-609

office suites, 525

online multiplayer games, 531

online resources, for technical support, 23

on-screen cues, 483

on-screen keyboard, 214-215, 489

OpenOffice Impress, 576-577

operating systems, 84-87. See also names of specific operating systems

I/O devices management, 86

memory management, 85-86

overview, 493-494

processor management, 84-85

providing interface to application programs, 86-87

providing user interface, 87

storage management, 86

optical tracking, on mice, 218-219

optimizing Windows

customizing the Taskbar, 421-425

display settings, 412-421

Appearance tab, 417-420

Desktop tab, 414-416

Screen saver tab, 416-417

Settings tab, 413-414

Themes tab, 420-421

setting mouse options, 421

System Tray, 425-428

hiding inactive icons, 427-428

setting date and time, 425-426

turning sound on or off, 410-412

outputs. See inputs and outputs

overclocking

cooling, 308-309

graphics controllers, 309-313

methods, 305-307

reasons not to overclock, 304-305

reasons to overclock, 303-304