トランジスターを論理素子とする計算機



IBM7000シリーズで使用された"Circuit Card"----６個の「トランジスタ」（上の右の図の下部にある円形の部品）と種々雑多な「抵抗」がジャンパー線で結合されている、大きさは2.5インチ×4.5インチ

The circuit cards shown here were developed as part of Project Stretch and were used in the IBM 7000 series of computers. Six transistors (in cylindrical metal cans) and assorted resistors and jumper wires were mounted on the card (right). Electrical interconnections among these components were achieved by soldering the component leads to copper lines preprinted on the back of the card (left). The cards were known as SMS cards because they were part of IBM's proprietary Standard Modular System of circuit packaging. The cards were 2.5 inches x 4.5 inches and were equipped with sixteen gold-plated tabs for making external electrical contact.
Emerson W. Pugh,Building IBM : shaping an industry and its technology ,MIT Press, 1995,p.234のFigure 16.2