- DTMF stands for Dual Tone Multi-Frequency (telephony)
- DTMF stands for Desktop Management Task Force
- DTMF stands for Data Tone Multiple Frequency
- DTMF stands for Dual Tone Multi-Function (telecommunications)
- DTMF stands for Defend Traditional Marriage and Family
- DTMF stands for Deilmann Tailings Management Facility (Key Lake Uranium Mine; Cameco Corporation; Canada)
DTMF