Calculators: C.Itoh
Japanese company (they were also known as CI and C.Itoh & Co., Ltd.) is now owned by Citizen America and make barcode printers and scanners, see http://www.citizen-america.com/citoh-orig/.   In the 1970s they were part of the Itochu group that can be traced back as far as 1858 and the linen trade.  This group was into heavy engineering (building bridges, desalination plants, oil refinery plants etc.)  More history can be seen at http://www.itochu.co.jp/main/coy/coy_3e.html.