Arc Java SafeTcl Obliq Supports C-like languages Y N N N Supports Smalltalk/lisp langs Y Y N N Automatic storage management ? Y Y Y Objects with inheritance *ext Y *ext Y Concurrency (threads,locks) ? Y N Y TCP/IP API *ext Y *ext Y Native code generation Y *ext N N Multi-platform GUI API N Y(awt) Y(Tk) Y(Trestle) X/Motif Support for GUI API N Y(OSF) Y(Tk) Y(Trestle) Windows Support for GUI API N *in-dev *in-dev N Mac Support for GUI API N *in-dev *in-dev N RPC support ? *in-dev N Y *ext: a possible extension, but not an integral part of the system *in-dev: designed and planned, but not yet released
