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Where WebRef says ‘None’ we have yet to establish a profile for this pioneer, though they are mentioned in wikiPCpedia.com wiki pages.
WebRef Surname/link First name/s PCpioneers book – page no/s
P869 O’Connor Kevin 531
P868 Oates Ed 428
P870 Odasz Frank 388
P1292 Oded Itchak 532
P871 Odhner Willgodt Theophil
P872 Oikarinen Jarkko 591
P1324 Okamoto Yoshiki
P873 Olivetti Adriano
P874 Oller i Roca Josep
P875 Olsen Ken 1, 11, 62-5, 74, 262
P876 Omidyar Pierre 552, 553, 554, 555, 561
P877 Onnes Heike Kammerlingh
P878 Opel John 286
P879 O’Regan Mike 240
P1368 Orsenna Erik
P880 Osborne Adam 18, 124, 178, 419, 611
P881 Ôshima Naoto 205
P882 Ossanna Joe F 56
P883 Otlet Paul Marie Ghislain
P884 Oughtred William