This is the complete list of documentation and written material

Documents
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- The Challenger Character Graphics Reference Manual, Aug 1978
- The 8K BASIC-IN-ROM Reference Manual, Sept 1978
- Operating System Listing OS65D v3.0
- DAC 1 User's Manual
- 65D Tutorial and Reference Manual, Aug 1981 (238 pages)

Schematics
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- Model 502 CPU board with BASIC-IN-ROM
- Model 542 Rev B Keyboard
- Model 527 24K Memory Board
- Model 540 Rev B-1 Video Board

Newsletters
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- TOSIE, June 26, 83 (TOSIE = Toronto Ohio Scientific Idea Exchange)
- TOSIE, July 31,83
- TOSIE, Feb 26,84
- TOSIE, Apr 1,84
- Aardvark Journal, Apr'80 Vol.1, No.1
- Aardvark Journal, Jun'80 Vol.1, No.2
- Aardvark Journal, Aug'80 Vol.1, No.3
- Aardvark Journal, Oct'80 Vol.1, No.4
- Aardvark Journal, Dec'80 Vol.1, No.5
- Aardvark Journal, Feb'81 Vol.1, No.6
- Aardvark Journal, Apr'81 Vol.2, No.1
- Aardvark Journal, Jun'81 Vol.2, No.2
- Aardvark Journal, Aug'81 Vol.2, No.3
- Aardvark Journal, Oct'81 Vol.2, No.4
- Aardvark Journal, Dec'81 Vol.2, No.5
- Aardvark Journal, Feb'82 Vol.2, No.6
- Aardvark Journal, Apr'82 Vol.3, No.1
- Aardvark Journal, Jun'82 Vol.3, No.2
- Aardvark Journal, Aug'82 Vol.3, No.3


Tiny Compiler V1.3 Source Listing and Info


Magazine Articles
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- Apr'81, Compute! - OSI C1P Control Functions
- Jun'81, Microcomputing - Nature Red In Tooth and Claw
- Jun'81, Microcomputing - OSI Baud Mod
- Jun'81, Creative Computing - OSI Tiger
- Aug'81, Compute! - OSI RS232 Port and the High Speed Printer Interface
- Sep'81, Compute! - Exploring OSI's Video Routine
- Oct'81, Compute! - Calling BASIC Commands from Machine Language
- Oct'81, Radio Electronics -Buyers Guide to Home Computers (C4P on front page)
- Feb'82, Compute! - Part II: A Small Operating System: OS65D, The Disk Routines
- Apr'82, Creative Computing - Improved Registration for Line Graphs


Misc
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- Omega Science Inc (Reseller) - Sept 1980 Catalog
- Light Pen Assembly
- Brochure - Challenger Desk-Top Computers. The bookkeeper's bookkeeper
- Ad - Cleveland Consumer Computers and Components - Summer Sale, Sept'80
- C1P Tech Report
- Servicing Data for 600 and 610


Books
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- First Book of OSI
- Third Book of OSI
- Fifth Book of OSI