Complex sentence: Cocoa also has a level of Internet support, including the NSURL and WebKit HTML classes, and others, while OpenStep had only rudimentary support for managed network connections through NSFileHandle classes and Berkeley sockets.
Split into simpler sentences: Cocoa also has a level of Internet support, including the NSURL and WebKit HTML classes, and others. While under OpenStep there was only rudimentary support for managed network connections through NSFileHandle classes and Berkeley sockets.