STC
STC is an abbreviation for:
- Saudi Telecom Company, Saudi Arabian telecommunications company
- Sensitivity Time Control , a radar assembly
- Short Time Constant , another radar assembly
- Society for Technical Communication , Association for Technical Communication
- Spreewaldring Training Center , public racing and practice track in Brandenburg
- Standard Telephones and Cables , UK company
- Standard Test Conditions , an evaluation standard for solar cells, see Standard Test Conditions (Photovoltaics)
- Supplemental Type Certificate , an advanced certificate of an aircraft after a design change, see Supplementary Type Certificate
- Switzerland Travel Center , sales organization for Swiss tourism