The line between Pascal and Object Pascal is very small. Some people might be thinking of the relationship between C and C++, but it is a different situation with Pascal and Object Pascal.
Object Pascal is an extension of Pascal. For instance, many of Apple's Object Pascal extensions were incorporated into Turbo Pascal. From Turbo Pascal version 5.5 and up, it is Borland's version of Object Pascal. You can use Objects and do OOP in Turbo Pascal.