The NTSC standard is incompatible with most computer video standards, which generally use RGB video signals. However, you can insert special video adapters into your computer that convert NTSC signals into computer video signals and vice versa.

Introduction to NTSC
Provides an introduction to conventional analog television.

Worldwide TV Standards
Describes why different TV standards exists, the pros and cons of NTSC, PAL and SECAM, broadcast system details, and video formats. Also contains FAQs, and information on standards conversions and how to bridge the gap between different video standards.

Y/C and composite video signals - tutorial
This a non-technical tutorial on the format of Y/C (S-Video) and composite video signals. It is specific to the NTSC video system.