Radio Corporation of America (RCA), 154, 220, 232–33, 249
Radio-Electronics, 269–73
Radio Shack, 275

TRS-80, 267
RAM (random-access memory)
first, 250–51
1K, 261, 263–64
64K, 282
vs, ROM, 269

Rand, James, 182, 217–18
Rand Corporation, 154
Random access retrieval, 73
Range, John, 169
Raytheon Associates, 158, 241
Real-time computer. See SABRE computer; Whirlwind computer
Reckoner, See Stepped Reckoner
Rectilinear slide rule, 11–12
Regenerative memory, 220
Relay calculators for complex arithmetic, 101–3
Relay circuits and symbolic logic, 100–1
Relays, calculators and, 93–94
Relay switches, and binary math, 100
Remington Rand

loss of lead by, 218–20
merger of, 217
in 1928, 183
programming effort of, 211
start of, 182
UNIVAC and, 162–64, 213

Remote computing, 102
Roberts, Edward, 271

Altair 8800 and, 272–76
background of, 270–71

Roberval, Pierre de, 27–28
Robinson, John Frederick, 43
Rock, Arthur, 259, 280
ROM (read-only memory), 261, 263, 269
Royal McBee, 220
Royal Radar Establishment, 230–32
Royal Society of London, 42–43, 47
Russell, Bertrand, 91, 143–44