A file of miscellaneous documents related to the production Peter Bird's book, LEO - The First Business Computer (1994). 

File contains the following items:
- Envelope addressed to Elisabetta (empty)
- Letter from Margaret and Brian to Gel about house, dated 9th Nov 1999 [related?]
- Electric pulse and delay tube diagrams [diagrams used in Peter Bird's book - p.249-250]
- Diagram of calculator [diagram used in Peter Bird's book - p.251]
- Diagram of calculator [diagram used in Peter Bird's book - p.251]
- Yellow pad with diagrams
- LEO - The First Business Computer dust jacket 
- Photograph of LEO - The First Business Computer dust jacket 
- LEO - The First Business Computer dust jacket 
- 23 A3 photocopies of all pages featuring photographs in Peter Bird's LEO - The First Business Computer
- Hexadecimal to character conversion sheet
- Hexadecimal to character conversion sheet

Provenance :
Collected by Peter Bird as part of his research for his book LEO - The First Business Computer (1994).