origins of 1, 31, 47–56, 47, 58, 60–1, 62, 73
Roman system of hand-signs for numbers 112–17, 113, 149
Yup’ik and 260
Haridatta 139
Hawaii 246, 250
Hebrew 85, 148, 160, 162
Hellenistic period 69
hieroglyphic script 95–8, 135
Hittites 86
Hollerith, Herman 206–14
Hollerith tabulator 206–14, 210, 217
hominid species 24, 32, 43, 48, 57, 231
Homo genus 32
Homo erectus 43
Homo sapiens
Africa, spread out of 6, 43, 57, 59, 62, 69
emergence of 33–4
Hong Gongshou 188–95
Hooke, Robert 176
House of Representatives, US 206, 211
Hugo of Lerchenfeld 161–3
hunter-gatherer societies 40, 53, 61, 263, 279
Iberia 151, 153
ice ages 45, 50, 51–2, 57, 71, 256
Ichitaro, Kawaguchi 205–7, 214
ideograms 86, 197
Indian number symbols 6
Arabic world, appearance of in 147–56, 155
Brahmi numerals 136–41, 145, 145, 147–9, 155, 160, 183, 193
Ibn Mun’im/dust numerals 147–54
place-value system 141–6, 149, 154, 150–1, 161, 164, 174, 184, 193
Toledan numerals and 157–65, 163
western Arabic form 155–6, 155
Indo-European languages 104, 136, 140
Indonesia 43, 225, 229, 231, 250
Indus Valley 98, 148
innate abilities 6, 11–30, 64, 287, 289
estimating 13–25, 20
subitising 26–30, 27
International Business Machines Corporation (IBM) 212–13, 217
