The Free On-line Dictionary of Computing (30 December 2018):

Olivetti

    A large Italian company producing office machinery,
   computers and printers.

   Olivetti took a controlling stake in Acorn Computers in
   September 1985.

   Olivetti computers were once marketed in USA with the ATT
   brand name.

   [Address?  Other products?]

   (1995-03-14)