Pin 1 – Unit 2 Anode (Plate) Pin 2 – Unit 2 Grid Pin 3 – Unit 2 Cathode Pin 4 – Unit 2 Heater Pin 5 – Unit 1 Heater Pin 6 – Unit 1 Anode (Plate) Pin 7 – Unit 1 Grid Pin 8 – Unit 1 Cathode Pin 9 – Heater mid-tap The 5965 is a miniature twin triode vacuum tube (thermionic valve) "designed for use in high-speed digital computers".

[1] According to an MIT Project Whirwind memorandum, the tube was developed c.1953 for IBM by GE, primarily for use in the IBM 701 computer, and was designated as a general-purpose triode tube.

[2] In European use the tube was labelled E180CC; sometimes the same tube was labelled with both names.

[3]