Some of the gui stuff actually made it into Plan 9, see the acme editor for more info. I love all of Wirths writing, he really does a lot to make complex topic

Some of the gui stuff actually made it into Plan 9, see the acme editor for more info. I love all of Wirths writing, he really does a lot to make complex topics approachable. Note there's a lot more to OOP than adding methods to records, on the surface yeah, but "primitive" sub-typing just scratches the surface. This isn't a criticism, just a note so anyone interested can learn more, Pierce's Types and Programming Languages is a good place to start.