مهندسی: Form Feed، تغذیه کاغذ [کامپیوتر]
کامپیوتر: Form Feed، اضافه شدن کاغد
[TahlilGaran] Persian Dictionary ▲
ff (and following) used in writing to refer to the pages after the one you have mentioned:
pages 17ff [TahlilGaran] Dictionary of Contemporary English ▲