Apple II - Monitors

Operating systems
Eich of the three Apple opcnling systcms-ProOOS, DOS 3.3. and
PaSC2l-formaLS disks in 1I different way. Therefore. you need to
know which operating system an application uses when you perform
any of three activities:
• SaVing dna to disk
• form:uting disks
• ""arking with adler disk utilities
<00 More operating systems: If you add a co-processor 10 your
computer, you may nod yourself with yet anOlhcr opcn.ting
system. For e:umple, the ZSO* microprocessor runs the
CP/M· operating system.
Ir your word processing prognm came on a ProDOS disk, you Mve
to save your d2u on ProOO5-fOrrTaucd data disks. If )'OUf cbta base
program runs under the Pascal opcr.u.ing system, you h;l,\'c to S2\'C
your dar..a on Pascal-fomuucd data disks. You can't keep your ""'Old
processing and d2u base data on the same disk unless the [wo
programs use the same oper.ating system.
'The ClIsicst .... -::ay to avoid confusion is to write the fUme of the
operating .system on a disk's label when you formal it If
compatibility of d1.u between different appliClilion pfagr-lIltS is
important to you, m.ake one of your sortW2re selection critcri.a .a
common opcr:ning system.
70 Choptef 4: The Inside Story