| Pions and muons | 15 |
| Pioneers? | 9 |
| Pioneers' wagon | 19 |
| Pioneers' vehicles | 22 |
| Pioneers' transports | 24 |
| Pioneers' transport | 23 |
| Pioneers' trail | 19 |
| Pioneers' route | 19 |
| Pioneers' convoy | 20 |
| Pioneers of ambient house, with "the" | 47 |
| Pioneers of a 365-day calendar | 30 |
| Pioneers | 8 |
| Pioneering women's rights advocate | 38 |
| Pioneering woman lawyer Bradwell | 32 |
| Pioneering weather satellite | 28 |
| Pioneering videogame | 20 |
| Pioneering video game systems | 29 |
| Pioneering video game company | 29 |
| Pioneering video game | 21 |
| Pioneering underground publication of the 1960s | 47 |
| Pioneering U.S. feminist | 24 |
| Pioneering Toyota | 17 |
| Pioneering stop-motion animation film | 37 |
| Pioneering step | 15 |
| Pioneering sort | 15 |
| Pioneering sex researcher who frequently wore bow ties | 54 |
| Pioneering Seattle grunge band | 30 |
| Pioneering scientist Robert | 27 |
| Pioneering Russian spacecraft series | 36 |
| Pioneering reporter Rogers St. Johns | 36 |
| Pioneering razor with a pivoting head | 37 |
| Pioneering rap trio from Queens | 31 |
| Pioneering rap trio | 19 |
| Pioneering quantum theorist | 27 |
| Pioneering puppeteer Tony | 25 |
| Pioneering puppeteer | 20 |
| Pioneering pulp magazine | 24 |
| Pioneering puffed cereal | 24 |
| Pioneering programmer Lovelace | 30 |
| Pioneering pollster Roper | 25 |
| Pioneering Pittsburgh radio station | 35 |
| Pioneering pilot Earhart | 24 |
| Pioneering pair preserver | 25 |
| Pioneering organizer | 20 |
| Pioneering nü-metal band | 27 |
| Pioneering name in car batteries | 32 |
| Pioneering musician in stereo ___ Light | 39 |
| Pioneering microcomputer | 24 |
| Pioneering mathematician | 24 |
| Pioneering map publisher William | 32 |
| Pioneering magician Tony | 24 |
| Pioneering late-night talker | 28 |
| Pioneering jazz standard of 1917 | 32 |
| Pioneering Italian sculptor | 27 |
| Pioneering ISP | 14 |
| Pioneering Internet company | 27 |
| Pioneering hypnotist | 20 |
| Pioneering hybrid | 17 |
| Pioneering hip-hop group with the hit "Walk This Way" | 63 |
| Pioneering heavy-metal band | 27 |
| Pioneering golf shoe brand | 26 |
| Pioneering German auto | 22 |
| Pioneering geneticist | 21 |
| Pioneering General Motors electric car | 38 |
| Pioneering game systems | 23 |
| Pioneering game company | 23 |
| Pioneering French designer with her own fragrance | 49 |
| Pioneering Frank King comic strip featuring Walt and Skeezix | 60 |
| Pioneering films | 16 |
| Pioneering film of 1940 | 23 |
| Pioneering film in stop-motion animation | 40 |
| Pioneering English Quaker | 25 |
| Pioneering electronic calculators | 33 |
| Pioneering electrical engineer Nikola | 37 |
| Pioneering electrical engineer | 30 |
| Pioneering Edward R. Murrow show of the '50s | 48 |
| Pioneering dub reggae producer nicknamed "Scratch" | 60 |
| Pioneering DJ Freed | 19 |
| Pioneering deejay Freed | 23 |
| Pioneering Dadaist | 18 |
| Pioneering D.J. Freed | 21 |
| Pioneering conservationist | 26 |
| Pioneering computer, for short | 30 |
| Pioneering computer of 1951 | 27 |
| Pioneering computer game | 24 |
| Pioneering computer | 19 |
| Pioneering company originally named Syzygy | 42 |
| Pioneering company behind "As Seen on TV" products | 60 |
| Pioneering comic Bruce | 22 |
| Pioneering comedy film producer | 31 |
| Pioneering college football coach | 33 |
| Pioneering collagist | 20 |
| Pioneering Christian rockers | 28 |
| Pioneering child care author | 28 |
| Pioneering cell phone co. | 25 |
| Pioneering cartoonist | 21 |
| Pioneering Canadian physician, Sir William ___ | 46 |
| Pioneering brand of decaf coffee | 32 |
| Pioneering Boeing planes | 24 |
| Pioneering blues singer Smith | 29 |