Makers of RapidFile and the ForthLanguage it was written in, MMForth. Still in operation in Massachusetts (Jill and DickMiller are partners in this company).
For more background information on Miller Micro, see: http://www.millermicro.com/
For RapidFile notes see: http://www.millermicro.com/who.html
Anyone interested can obtain a boilerplate letter template for Rapid File inquiries upon demand.