Borland: How may versions of Delphi are there?

I just saw a 16-bit version of Delphi at the local Best Buy!  Is this a
repack of 1.02?  What are the available versions?  I'm trying to
determine which one to buy for work, and between obsolete catalogs and
new releases I'm lost.  An official answer from Borland, e.g. Steve T
would be nice here :)

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