| Symbol | Section Title | Associated Classes |
|---|---|---|
| A | HUMAN NECESSITIES | |
| B | PERFORMING OPERATIONS; TRANSPORTING | |
| C | CHEMISTRY; METALLURGY | |
| D | TEXTILES; PAPER | |
| E | FIXED CONSTRUCTIONS | |
| F | MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING | |
| G | PHYSICS | |
| H | ELECTRICITY | |
| Y | GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS |