**NTSC - National Television System Committee** - An analog broadcast system. **3.579545 MHz - Color Burst Frequency** - A short burst of this frequency is sent with each scanline during TV video transmission, which helps the TV demodulate the color signal. - Precise frequency stability is critical, or the TV will reproduce inaccurate colors. - Mostly replaced by digital standards today. **DTMF - Dual-Tone Multi-Frequency Signaling** - The system behind the dial tones when you type in a phone number - Still widespread in modern telecom - Chips like the MT8870 use the Color Burst frequency to decode DTMF tones