Including roads, waterways, railways, postal service, telecommunication, telegraph, telephone, broadcasting, commercial aviation
For transportation and communications by region or country see HE201+
See also HF1+ Commerce; P87+ Communication. Mass media; TA1001+ Transportation engineering
| Call Number | Subject |
|---|---|
| D 1-24.5 | General |
| Call Number | Subject |
|---|---|
| HE 1-7 | Periodicals. Societies. Serials. By language of publication |
| HE 8.9-9 | Shippers' guides. Directories. Timetables See also G153+ Travelers' guides |
| HE 11 | Congresses |
| HE 141 | Dictionaries. Encyclopedias |
| HE 147.5-149 | Theory. Method. Relation to other subjects |
| - HE 147.5 | - General works |
| - HE 147.6 | - Data processing |
| - HE 147.65 | - Environmental aspects |
| - HE 147.7 | - Mathematical models |
| - HE 148 | - Transportation & community development |
| - HE 148.5 | - Transportation & developing countries |
| HE 151 | General works |
| HE 155-181 | History |
| - Prehistoric see GN438+ | |
| - HE 159-175 | - Ancient |
| - - HE 161 | - - Egypt |
| - HE 181 | - Middle Ages By region or country see HE201+ |
| HE 191.4-191.5 | Statistics |
| HE 192.5-192.55 | Research |
| HE 193 | Government policy (General) For government policy by region or country see HE201+ |
| HE 194-194.5 | Transportation safety. Transportation accidents |
| HE 195.4-195.5 | Rates Including costs |
| HE 196.5 | Finance |
| HE 196.9-197 | Taxation. Tolls |
| Call Number | Subject |
|---|---|
| HE 199-199.5 | Freight (General) For freight related to a special mode of transportation, see the mode |
| - HE 199.A2 | - General works |
| - HE 199.A3-Z | - By region or country, A-Z |
| - - HE 199.E85 | - - Europe |
| - - HE 199.U5 | - - United States |
| - HE 199.5.A-Z | - Special commodities, A-Z |
| - - HE 199.5.C6-.C612 | - - Coal |
| - - HE 199.5.D3-.D32 | - - Dangerous goods. Hazardous substances |
| - - HE 199.5.F3-.F32 | - - Farm produce |
| - - HE 199.5.P4-.P42 | - - Petroleum |
| - - HE 199.5.R3-.R32 | - - Radioactive substances |
| HE 199.9 | Passenger traffic (General) For passenger traffic by special modes of transportation, see the mode See also HQ1063.5 Older people; HV554 Evacuation of civilians in disasters; HV3022 People with physical disabilities; LB2864+ School children |
| Call Number | Subject |
|---|---|
| HE 201-213 | America |
| - HE 202.5-213 | - United States |
| - - HE 203 | - - General works |
| - - HE 204-206.3 | - - Government policy |
| - - - HE 204 | - - - To 1860 |
| - - - HE 206 | - - - 1900-1967 |
| - - - HE 206.2-206.3 | - - - 1967- |
| - - - - HE 206.2 | - - - - General works |
| - - - - HE 206.3 | - - - - Department of Transportation |
| - - HE 207 | - - New England & Middle Atlantic States |
| - - HE 208 | - - Southern States |
| - - HE 210-210.7 | - - West |
| - - HE 211 | - - Pacific States |
| - - HE 213.A-W | - - States, A-W |
| - - - HE 213.F6 | - - - Florida |
| - - Cities see HE310.A+ | |
| HE 215-300 | Other regions or countries |
| - HE 215 | - Canada |
| - HE 215.5-241 | - Latin America |
| - HE 242-267.8 | - Europe |
| - - HE 242 | - - General |
| - - HE 242.8 | - - European Economic Community countries |
| - - HE 243-245.5 | - - Great Britain |
| - - HE 255 | - - Russia. Soviet Union. Former Soviet republics |
| - HE 268-281.7 | - Asia |
| - - HE 269.3-271.6 | - - South Asia |
| - - HE 276.5-281 | - - East Asia. Far East |
| - HE 282-288.4 | - Africa |