| Pioneer Day month, in Utah | 26 |
| Pioneer Expressionist James | 27 |
| Pioneer geneticist Gregor | 25 |
| Pioneer German automaker | 24 |
| Pioneer guitar producer Paul | 28 |
| Pioneer in 35mm cameras | 23 |
| Pioneer in bacteriology | 23 |
| Pioneer in calculus notation | 28 |
| Pioneer in electrical science | 29 |
| Pioneer in electricity | 22 |
| Pioneer in electrodynamics | 26 |
| Pioneer in fluid mechanics | 26 |
| Pioneer in I.Q. testing | 23 |
| Pioneer in instant messaging | 28 |
| Pioneer in late-night TV | 24 |
| Pioneer in literary realism | 27 |
| Pioneer in mathematical logic | 29 |
| Pioneer in New Criticism | 24 |
| Pioneer in number theory | 24 |
| Pioneer in probability | 22 |
| Pioneer in psychoanalysis | 25 |
| Pioneer in quadraphonic music | 29 |
| Pioneer in quantum theory | 25 |
| Pioneer in scholasticism | 24 |
| Pioneer in smooth jazz | 22 |
| Pioneer in synthesizers | 23 |
| Pioneer in the math of sudoku | 29 |
| Pioneer in vaccination | 22 |
| Pioneer movie director | 22 |
| Pioneer name in video games | 27 |
| Pioneer of antiseptic surgery | 29 |
| Pioneer of detective fiction | 28 |
| Pioneer of New Journalism | 25 |
| Pioneer of projectile physics | 29 |
| Pioneer of slapstick cinema | 27 |
| Pioneer performance artist | 26 |
| Pioneer photojournalist | 23 |
| Pioneer physicist Alessandro | 28 |
| Pioneer preservationist | 23 |
| Pioneer radiation researcher | 28 |
| Pioneer reggae musician | 23 |
| Pioneer sci-fi man et al. | 25 |
| Pioneer talk show host | 22 |
| Pioneer transportation | 22 |
| Pioneer TV personality | 22 |
| Pioneer video game systems | 26 |
| Pioneer video-game name | 23 |
| Pioneer's cap supplier | 26 |
| Pioneer's direction | 23 |
| Pioneer's hat material | 26 |
| Pioneer's hearing? | 22 |
| Pioneer's purchase | 22 |
| Pioneer's rug material | 26 |
| Pioneer's transport | 23 |
| Pioneer's transportation | 28 |
| Pioneered, as a movement | 24 |
| Pioneering 1940s computer | 25 |
| Pioneering 1982 sci-fi film | 27 |
| Pioneering 35 mm. camera | 24 |
| Pioneering anti-AIDS drug | 25 |
| Pioneering black sportscaster | 29 |
| Pioneering blues singer Smith | 29 |
| Pioneering Boeing planes | 24 |
| Pioneering cell phone co. | 25 |
| Pioneering child care author | 28 |
| Pioneering Christian rockers | 28 |
| Pioneering comic Bruce | 22 |
| Pioneering computer game | 24 |
| Pioneering computer of 1951 | 27 |
| Pioneering conservationist | 26 |
| Pioneering deejay Freed | 23 |
| Pioneering English Quaker | 25 |
| Pioneering film of 1940 | 23 |
| Pioneering game company | 23 |
| Pioneering game systems | 23 |
| Pioneering German auto | 22 |
| Pioneering golf shoe brand | 26 |
| Pioneering heavy-metal band | 27 |
| Pioneering Internet company | 27 |
| Pioneering Italian sculptor | 27 |
| Pioneering late-night talker | 28 |
| Pioneering magician Tony | 24 |
| Pioneering mathematician | 24 |
| Pioneering microcomputer | 24 |
| Pioneering nü-metal band | 27 |
| Pioneering pair preserver | 25 |
| Pioneering pilot Earhart | 24 |
| Pioneering pollster Roper | 25 |
| Pioneering puffed cereal | 24 |
| Pioneering pulp magazine | 24 |
| Pioneering puppeteer Tony | 25 |
| Pioneering quantum theorist | 27 |
| Pioneering scientist Robert | 27 |
| Pioneering U.S. feminist | 24 |
| Pioneering video game company | 29 |
| Pioneering video game systems | 29 |
| Pioneering weather satellite | 28 |
| Pioneers' transport | 23 |
| Pioneers' transports | 24 |
| Pioneers' vehicles | 22 |