IBM System/34 - F1, I1, S1-S3, and M1.01 - M2.10

M2.10

These are proper names given to system equipment.

F1 is the Fixed Disk (the hard drive.) I1 is the Diskette Drive. S1, S2, and S3 are the three single Diskette Slots (if a magazine drive is connected.) M1.01-M1.10 are diskette slots 1 through 10 on Magazine 1. M2.01-M2.10 are diskette slots 1 through 10 on Magazine 2.