BB> [...] it's a useful little book.
 GW>>> I agree that it's useful, especially as there are no major
 GW>>> extensions to the MS/PCDOS interface since DOS 3.3, [...]
 JDBP>> I'd say that the new file open API introduced in DOS 4.0 is
 JDBP>> "major".  
 GW> Which API is that? Int 21 Function 6Ch?
Yes.  And there are equally major additions to the DOS API in MS-DOS 7.0.  
MS-DOS 5.0 also has some non-trivial additions.
 ¯ JdeBP ®
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