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1. Restoring HP25 S/N 1702S13138 - Very strange take a look (6 Replies)
2. Strange behaviour of prime numbers (33 Replies)
3. hp 50G build quality in today's standards (2018) (23 Replies)
4. New submission for Saturn assembly version of Math and Trig benchmarks... (18 Replies)
5. 71B: repair/polish LCD screen scratches (14 Replies)
6. V41 Maintenance Release R9B (1 Reply)
7. Plastic parts (0 Replies)
8. HP27: lowest keyboard horizontal row not working (4 Replies)
9. When ISZ/DSZ > ISG/DSE (12 Replies)
10. Little explorations with HP calculators (no Prime) (353 Replies)
11. Powering a HP 67 without battery pack? (5 Replies)
12. Updating the HP-41CX OS code (really 41CL) (2 Replies)
13. Largest Known Prime Number discovered (17 Replies)
14. HP65 Extreme Makeover S/N 1333S07557 - Advice requested (9 Replies)
15. Recall Arithmetic: The haves and have-nots (26 Replies)
16. Garbage in HP50g ERAM when battery low (5 Replies)
17. Programming puzzles: processing lists! (279 Replies)
18. HP 46 repair (32 Replies)
19. HP 48GX Hidden Directory (14 Replies)
20. Restoring HP-65 (30 Replies)
21. Apportionment (4 Replies)
22. List Commands Library for 50g (409 Replies)
23. HP-41 Card Reader Question (7 Replies)
24. 3421A CAL RAM (35 Replies)
25. It's all about honesty. (Long) (43 Replies)
26. HP 41(CX) - ADDING MEMORY (11 Replies)
27. HP12C battery contact question (9 Replies)
28. PDF of article on HP 41 (2 Replies)
29. Help with HP brochure (2 Replies)
30. 41CV won't turn on after reassembly. Did I kill it? (30 Replies)