Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Computer specialist Donald Dodson, OCCS (Office of Computer and Communications Systems), at the National Library of Medicine examines output from a high speed IBM impact printer.
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)