Object Pascal was invented by Apple in collaboration with Wirth for Mac OS, as evolution from clascal used in Lisa.
Until the C and C++ took over inside Apple R&D, Mac OS was mostly programmed in Assembly and Object Pascal, and then it was time for C++ to take over.
Even the stuff that looks like C, is actually extern "C" under the hood.
Also no one really used the initial Pascal implementation, just like with C, most compilers had plenty of extensions, like Apple's Object Pascal.
Some of those extensions were later standardizes as Extended Pascal, however by then Modula-2 and Object Pascal (Apple and Borland's followup) were more relevant, Ada was coming into the picture, and thus everyone ignored ISO Extended Pascal.
Until the C and C++ took over inside Apple R&D, Mac OS was mostly programmed in Assembly and Object Pascal, and then it was time for C++ to take over.
Even the stuff that looks like C, is actually extern "C" under the hood.
Also no one really used the initial Pascal implementation, just like with C, most compilers had plenty of extensions, like Apple's Object Pascal.
Some of those extensions were later standardizes as Extended Pascal, however by then Modula-2 and Object Pascal (Apple and Borland's followup) were more relevant, Ada was coming into the picture, and thus everyone ignored ISO Extended Pascal.