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This is the manual for the Hewlet Packard Model AC-4A & AC-4B Decade Counters. (Note: the AC-4A & AC-4B are the numerical indicators for the 521A/C Electronic Counter.) Scanned by Matthew S. Taylor, det7360@peoplepc.com, on 1:44 PM 7/24/2002.
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This is the BAMA archive. These manuals are available for download and free of charge.
New! and Experimental! A wiki page is now available so you can share your work with others. have a look: http://bama.edebris.com/wiki/index.php?title=hp/ac4a.
These viewers may be required to view the manuals on this archive:
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If anyone knows of additional suitable GIF/JPEG viewers that are free to use, email me and I will include a link.
If you have a better copy of any of these manuals or a manual which is not listed, and wish to share, you can upload the manual to ftp://bama.edebris.com/uploads/ . Or, you can email me directly with the manual. I accept all formats.
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