| Clue | Source | Date |
|---|---|---|
| Bridge builders, briefly | ||
| Some MIT grads | The Washington Post | 26 Mar 2019 |
| Some MIT grads | LA Times Daily | 26 Mar 2019 |
| Some MIT grads | ||
| Applied sci. professionals | Wall Street Journal | 28 Feb 2017 |
| Some RPI grads | LA Times Daily | 23 Jul 2016 |
| Some RPI grads | Wall Street Journal | 19 Mar 2016 |
| Some RPI grads | ||
| Some tech sch. grads | The Washington Post | 21 Nov 2015 |
| Some tech sch. grads | ||
| Many MIT graduates | ||
| Many Caltech grads | ||
| Many Caltech grads | ||
| Many Cal Tech grads | ||
| Many Rice grads: Abbr. | ||
| Some MIT grads | ||
| Many Cal Tech grads | ||
| Many Cal Tech grads | ||
| Hwy. planners | ||
| Boeing personnel: Abbr. | ||
| Some Caltech grads | ||
| Corps personnel: Abbr. | ||
| Some MIT grads | ||
| R.P.I. grads | ||
| Mass. Inst. Of Tech. grads | ||
| M.I.T. grads | ||
| Certain college grads: Abbr. | ||
| Important workers: Abbr. | ||
| Bridge builders: Abbr. | ||
| Specialists in mechanics: Abbr. | ||
| Printers: Abbr. | ||
| Railroad men: Abbr. |