A
SECTION A — HUMAN NECESSITIES
 B
SECTION B — PERFORMING OPERATIONS
 C
SECTION C — CHEMISTRY AND METALLURGY
 D
SECTION D — TEXTILES AND PAPER
 E
SECTION E — FIXED CONSTRUCTIONS
 F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
 G
SECTION G — PHYSICS
 H
SECTION H — ELECTRICITY