Open circuit, 314
OpenGL, 271
Optical encoding disk, 466
Optical mouse, 465, 470, 577
Optimizing a hard disk, 591-592
Optomechanical mouse, 465-467, 469
OR Boolean algebra operations, 45
Ordered dithering (color halftoning), 420-421
OTP (One-Time Programmable) memory, 118
Output devices, 20-21, 580-585
Overclocking, 60
Oxide media, 175
Ozone filter (printer), 438
P
Packard Bell, 76
Page printer, 424
Pages per minute (ppm), 407, 431
Palm Pilot, 16
Palmto pcom puters, 16-17, 396
Palo Alto Research Center (PARC), 405
Paper flow, inkjet printer, 422-423
Paper (printer), 422, 436
Paper transport, laser printer, 429
Parallel cable distance limitations, 435
Parallel data transmission, 482
Parallel ports, 92, 229, 301-302, 434-436, 491-492
Parameter RAM (PRAM), 137, 147
Parity checking systems, 144
Parity error, 144
Parity memory, 144-145
Passive backplane, 73
Passive matrix LCD, 372, 392-395
Password-clear jumper on motherboard, 126
Passwords, 125, 397-398
PC AT power supply, 323-324
PC AT motherboards, 75
PC Card, 226, 234-235
PC Card modem with X-jack, 236
PC expansion slots, 224
PC printer, evolution of, 402
PC XT keyboard, 454
PC XT power supply, 323-324
PC-based entertainment centers, 540
PCI (Peripheral Component Interconnect)
bus, 89-90, 186, 223, 256, 268
card slot, 268
interface, 500-501
and IRQs, 294-296
network interface card, 225
modem expansion card, 236
parallel port expansion card, 232
properties, 296
sound cards, 555-556
PCMCIA (PC Memory Card International
Association), 226
PCs (personal computers), history of, 9-13
Peer-to-peer (peer-based) networks, 511
Pen (stylus), 566
Pen-based computer, 396
Pentium clone processors, 61-62
Pentium processors (Intel), 14, 61-69, 97-101
packaging on, 52
Pentium II, 62-65
Pentium II Celeron, 64-65
Pentium II Xeon, 64-65
Pentium III, 53, 67
Pentium 4, 68-69
Pentium MMX, 61
Pentium Pro, 62-63
Peripheral device connectors (motherboard), 480
Personal digital assistant (PDA), 16, 18, 396, 537
Phoenix BIOS bee pcodes, 115
Phong shading, 273
Photo CD, 206
Photo detector, 209
Pin-cushioning (monitor), 378
Pipelined burst (PLB) cache, 163-164
Pipelining, 163
Pits, 207
Pixels (picture elements), 261, 372-373, 380
Planar, 72
Plated media, 175
Platters, 171-173
Platters mounted on spindle, 173
Play Control mixer (Windows), 549
Plotters, 408
Plug and Play (PnP), 123-124, 243, 296
Plug strip (with surge suppressor), 331
Point sizes (font), 411
Pointing devices (other than mouse), 471-474
Point-to-Point Protocol (PPP), 531
Portable PCs
interface, 226-229
keyboards, 455
maintenance, 595
Portable pen-based computer, 396
Portable power generators, 613-614
Portable power supply, 613
Ports and connectors, 475-507, 594
Ports on a PC, 481
POST boot error codes, 625-626
POST errors, 622-626
POST (Power-On Self-Test) process, 110, 112-114
PostScript fonts, 410
POTS (plain old telephone system), 529
Power connector, 82, 183
Power controllers, 607
Power cord, monitor, 399
Power issues, 34, 329-335, 599-615
Power line problems, 600-603Index^647