Model DC-303 is an obscure keyboard from Mark Hild, Inc. that was advertised in Electronic Engineer magazine in 1970. DC-303 is an ASCII output keyboard. It is said to have an “all-ss design [that] eliminates mechanical linkages and electromechanical parts, providing bounce and noise free operation.”
There was no illustration in the magazine advertisement, and no patents under that company name.
All material was scanned by Bitsavers.
- DC-303 keyboard advertisement, The Electronic Engineer, Vol. 29 No. 9, September 1970