Object Pascal ... in 1983
"Object Pascal was Borland's own language, with full support for inheritance."
Eh, no. Clascal, an object version of Pascal, was the main language on the Lisa in 1983. Pascal was the principal language on Macintosh from its launch in 1984 on through the 80s, and the multi-volume Inside Macintosh, the bible of Mac development, had its APIs and examples were all Pascal.
I LOVED Think Pascal with its wonderful editor. When Metrowerks' CodeWarrior came out I happily switched for its sheer power. In 1998, I ported my principal analytical apps to Windows (while still maintaining my Mac versions), and I chose to develop in Delphi due to the ease of porting my Pascal code. The user interface was created within Delphi, but principal calculations were conducted by a separate DLL which was written in CodeWarrior. CodeWarrior ran on either Win or Mac, and could create Mac apps, Win apps or Win DLLs using either development platform. So, I could write in CW for the Mac, and still in CW generate a DLL to be used with the Delphi apps. Sweet!