42 Design, programming and maintenance for others of computer programs for applied electronic machines and apparatus for testing semiconductors including large scale integrated circuits; consultation regarding applied electronic machines and apparatus for manufacturing and testing semiconductors including large scale integrated circuits; design for others of measuring apparatus and instruments including their parts and systems composed of such machines; design for others of electrical communication machines and apparatus including their parts and systems composed of such machines; design for others of applied electronic machines and apparatus for testing semiconductors including large scale integrated circuits including their parts and systems composed of such machines; testing and technical research on measuring apparatus and instruments; testing and technical research on electrical communication machines and apparatus; testing and technical research on applied electronic machines and apparatus for testing semiconductors including large scale integrated circuits; rental of computers including central processor unit and electronic circuits, magnetic discs and magnetic tapes with computer programs, and other peripheral equipment; editing of computer program operation manuals,