Extracting Data

I would like to upload and extract programs from an old-ish vmc. Any suggestions welcome.The machine is a Cincinnati Milacron Arrow 750. This has a Control Tecniques Precision Systems Operating sytem.I know where the RS-232-C port is and thats about as far as i can get.Can anyone tell me what i need to send and receive progs ie-hardware and software. Could i us a a laptop,or a netbook?.My instincts tell me this sytem has been around for so long,what irequire doesent exist anymore,but you chaps could prove me wrong.:question: