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Library of Congress Classification System
The Carnegie Library of Pittsburgh uses the Library of Congress Classification System. The Library of Congress offers an overview of the classes. See our Library Subject Guide for more help with Subject Headings.
| Subject Area | LC Class |
| Automobile Repair | TL 152-230 |
| Basket Making | TT 879.B3 |
| Bonsai | SB 433.5 |
| Building Codes | KF 5701 |
| Building Plans (Houses) | NA 7100-7566 |
| Carpentry | TH 5601-5691 |
| Child Care |
HQ 796 RJ 61-101 |
| Child Development |
LB 1101 HQ 771 |
| Child Psychology |
BF 721-723 HQ 767-772 LB 1115-1117 |
| Etiquette | BJ 1801-2193 |
| Family |
HQ 515-797 GT 2420 GN 480 |
| Fashion |
TT 500-645, GT 500-2370 |
| Feng Shui | BF 1779.F4 |
| Flower Arranging | SB 449 |
| Flowers | SB403-SB450 |
| Furniture (Construction) | TT 194-199.4 |
| Gardening | SB 451-466 |
| Grooming | RA7777.8-778 |
| Herbs | SB 351 |
| Historic Preservation | |
| Holidays | GT 3900 |
| Home Economics | TX 11-301 |
| Home Improvement / Repair |
TH 4811-4817
NA 100-7205 |
| Horticulture | SB 51-418 |
| House Buying |
TH 4817-5
HD 1379 |
| House Painting | TT 320-324 |
| House Plans |
NA 7100-7566
TH 4812 |
| House Plants | SB 419 |
| House Remodeling and Repair |
TH 4811-4817
NA 7100-7205 |
| Insurance | HG 8051 |
| Interior Decoration |
NK 1700,
TX 311-317 |
| Landscape Gardening | SB 469-479 |
