Electronic Apparatus and Vacuum Unit for Testing Electronic Circuits and Electronic Fixture for Holding or Mounting the Tester, Electronic Data Input and Output Apparatus and Electronic Visual Display Units, All for Use with the Aforesaid Apparatus for Testing; Parts and Fittings for All the Aforesaid Goods; Magnetic Tapes, Magnetic Discs and Wires, All for the Carrying and Storing of Data and of Computer Programmes, Computer Programmes, Encoded Tapes, Discs and Encoded Wires, All for Use in ...