The Marconi Collection comprises:
- C1, File of material re. Transistorised Automatic Computer (TAC), including: circuit diagrams, summary of order codes, technical assessments, c 1962;
- C2, File of miscellaneous material, including:
- Mentor Design Specification, typescript, 1963. Notes re. Enhanced Myriad Machine, 1965;
- W.D. Worthy, ALGOL Primer, typescript, 1965;
- Typescript re Stop!?!, 1965;
- Software Proposal: Language Assembly System and Compiler Generator Feasibility Study, typescript, 1965;
- W.D. Worthy, Unlimited Autoextraction by Digital Filtering, interim technical memo, 1970;
- E.R. Eastal, A Guide to the Literature Published in 1969-70 on Computer Technology, Marconi Survey Series, 1971.
- C3, Collection of Baddow Research Laboratories Interim Technical Memoranda, 1958-1970:
- W.D. Worthy, Early Warning Radar Trackers, No. 409;
- W.D. Worthy and M.J. Woodhead, TAC High Speed Digital Computer, No. 499;
- W.D. Worthy, The TAC Transistorised Automatic Computer for General Purpose Computation, No. 537;
- W.D. Worthy, The Digital Differential Analyser, No. 601;
- W.D. Worthy, Boolean Algebra and Binary Arithmetic, No. 617;
- W.D. Worthy, Schizophrenic Computer, No. 621;
- M.J. Woodhead, TAC High Speed Digital Computer. PN Unit Version, No. 635;
- W.D. Worthy and M.J. Woodhead, Mutual Checking of Two Computers, No. 739;
- M.J. Worthy, ITM 836 TAC How It Works, No. 836;
- W.D. and M.J. Worthy, TAC Programmer's Manual. First Edition June 1961, No. 954;
- N.R. Sudweeks, Trigonometrical SubRoutines for TAC, No. 1002;
- W.D. Worthy, DIC Drum Incremental Computers, No. 1089;
- W.D. Worthy, Magnetic Core or Film DDA, No. 1205;
- W.D. Worthy, TAC Order Code: Revised August 1962, No. 1284;
- W.D. Worthy, Diffusion and Surface Conductivity, No. 1340;
- B. Lewis and W.D. Worthy, Minimal Computer, No. 1447;
- W.D. Worthy, Computer with Language Oriented Order Code, No. 1825;
- W.D. Worthy and K. Hosking, Floating Point for Myriad, No. 2047;
- N. Hannon, Polynomial Function Manipulation on the KDF9 Computer, No. 2048;
- W.D. and M.J. Worthy, Design of a Simple Parallel Computer. An explanation of the programming and mode of operation of a computer designed for simplicity of construction and operation, No. 2183;
- W.D. Worthy, Study of a Partially Analogue and Partially Digital System, No. 2353;
- W.D. Worthy, Data Analysis, No. 2735;
- W.D. Worthy, Digital Specification and Synthesis of an FM Waveform, No. 3335.