Weapons vs. Armor - Alternate tables

For the folks out there like me who use the weapons vs. armour tables in AD&D here is the OSRIC alternative located at Dragonsfoot.

Weapons vs. Armor (rationalised)

Author	David Williams
Description	A set of alternative, rationalised, weapons vs. armour tables.
Last Downloaded	Saturday, 16 February 2013
Type of file	PDF File
Size of file	148 KB
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In the words of David Williams;

Really, there is no fundamental difference between the OSRIC version and the AD&D version. I just reduced the weapons on the table to display only those with stats in OSRIC, which has fewer weapons than AD&D, primarily a reduction in polearms. When calculating the table, I made the following assumptions:
(1) The AC TYPE column on the original AD&D table referred to armor ONLY, not lesser armor + shield.
(2) The difference between AC 10 and AC 9 is the effect of a shield, and that effect should be transferable to heavier armor types.
(3) Since AC Type 2 could ONLY be plate + shield already, I kept that value rather than interpreting it with assumption 2 above.