Video on Videotape These VHS / NTSC videotapes are convenient for use in the classroom or laboratory. All you need is a standard VHS videocassette player (VCP or VCR) and a television monitor. HIV-1 Protease: An Enzyme at Work SP-13 Quantitative Techniques in Volumetric Analysis SP-15 Techniques In Organic Chemistry, Part 1 SP-20 Techniques In Organic Chemistry, Part 2 SP-22