3/o: reads key (usually playside DE, iirc typically a 4/5 tech read)
Then runs outside and will read the next key (typically play side olb) for the pitch
Zone read option: the first read of the 3/o by itself
Midline: similar to zone read, but the read key is the guy lined up across from the guard (2 tech). Iirc, the b back takes the a gap and the qb takes the bgap.
Load option: a double option, but the bback doesn't go forward, he runs outside as a lead blocker ( or the aback blocks and the bback is your option)
The sweep we run is like the load option, but both the motioning aback and bback will be ahead of the qb as blockers. At times, it looked like we were running this with the qb outrunning his blockers.
(Might've mixed some terminology in there, and I'm not a player, so take it with a grain of salt)