BOSS means Büroorientierte Systeme und Software)

Models:

- Boss A: two 5.25" FDD of 128 kb each,
- Boss B: two 5.25" FDD of 256 kb each,
- Boss C: two 5.25" FDD of 600 kb each,
- Boss D: one 5.25" HD of 5Mb and one FDD of 600 kb,
- Boss M: one 5.25" HD of 10Mb and one interchangeable HDD 10Mb, One V11 RS-422 interface with 250KB/s
- Boss X: Terminal only, without FDD
- Boss X8: 8" Diskdrive Format IBM 3740
- Boss 2: Z80A instead of the Intel 8085? 

Operating Systems:

             Boss A 8085 Boss A Z80 Boss B 8085 Boss B Z80 Boss C Z80 Boss D Z80 
ROMs               x          -          x           x          x         x
Prologue           x          -          x           x          x         x
CP/M               x          -          x?          x          x         x

O = missing, x = available, - = no MAME support

Programming languages:
Assembler
MBasic 5.21
Bascom
BAL
Cobol-80
Fortran-80
Pascal MT+