First base (342 pages)
First call resolution (323 pages)
First call resolution (FCR) (404 pages)
First day (402 pages)
First lien (370 pages)
First order differential equation (205 pages)
First to Bingo (459 pages)
First to file (299 pages)
First to invent (329 pages)
First-class In detail

First-order differential equation (251 pages)
First-rate (629 pages)
First-time In detail
First-timer offer (214 pages)
First-to-invent (363 pages)
Stage-gate process (410 pages)
Staged rollout (409 pages)
Stagehand (390 pages)
Stager (474 pages)