Hahn, Mathieus, 37–38
Haibt, Lois, 215
Halen, Richard, 193
Hamilton, Francis E., 104
Hammer, Franz, 15, 20
Harmonic analyzer, 84, 86
Hart, Joseph K., 284
Harvard Mark I.  See Mark I (Harvard)
Hastings, S. M., 175
H-bomb

ENIAC and, 130–31
simulations of (see EDVAC)

Heathkit, 275
Henschel Aircraft Company, 92, 95
Herrick, Harlan, 213–14
Herschel, John, 40, 45–46
Hewlett-Packard Company, 241, 267, 277, 279
Hilbert, David, 143–44
Hindu-Arabic numbers, 4–6
Hobbyists, personal computers and electronic, 268–76
Hoerni, Jean, 239–242, 259
Hoff, Marcian E., 262–65
Hollerith, Herman, 175–76

background of, 70, 72
patents and, 69
tabulating system of (see Hollerith’s tabulating system)

Hollerith’s tabulating system, 72–74

Census use of, 76–78
punch cards in, 73–74
use of electricity in, 74

Holman, Smith, 193
Homebrew Computer Club, 278–79
Home computer. See Personal computer
Honeywell-Sperry patent case, 220, 222
Hopper, Grace Murray, 214
Hunt, William C., 75
Hurd, Cuthbert C., 191–93, 209, 215
Hydraulics, basic principle of, 23