From: doug
Email: alwaysup@att.net
[1] Hp-41 Series X-Memory Module [HP82181A]
[2] Hp-41 Series X-Functions Module [Hp5061-5256]
[3] Hp-41 Series Time Module [HP82182A]
[4] Hp-41 Vinyl Case for Modules
[1] 82180A Extended Functions/Memory Module Owner's Manual - 82180-90001
[2] Hp-82181A Extended Memory Module Multilingual Instructions - 82181-90001
[3] Hp-82180A Extended Functions/Memory Module Quick Reference Guide - 82180-90002
[4] Hp-82182A Time Module Owner's Manual 82182-90001 - This is a copy but a good one