A simple compound, used as a model or pattern to which other compounds are conveniently regarded as being related, and from which they may be actually or theoretically derived.

Super VHS: These models have laser quality picture. This is a high-end feature and S-VHS models are generally top-of-the-line. These systems have the Hi-Fi stereo feature. Will operate nearly every brand of television and cable box in addition to the VCR. Good feature because it means that you will only lose (and have to find) one remote.

a model of OptionalPointee if it points to (or refers to) a value that may not exist

Six personality types and six environmental models in explaining behavior in environments.  No person is a true type; but indicating the types a person resembles helps to describe the person.

Super VHS: These models have laser quality picture. This is a high-end feature and S-VHS models are generally top-of-the-line. These systems have the Hi-Fi stereo feature (see that definition). Video Heads: Effect picture image. More heads allow for a clean, steady picture; free from interference and shaky noise lines. The number of heads in a VCR varies from 2 to 6, although four is considered standard and plenty. Six head vcrs record and playback in EP mode with SP quality. Hi-Fi Stereo: Generates virtually the same sound range and clarity of a compact disc. This feature is the critical component to quality home theater. All Super VHS models have Hi-Fi. Dual Deck: A VCR with slots for two tapes. These are generally used for copying one tape onto another. D-VHS: These models, using D-VHS tapes, allow you to digitally record and playback direct broadcast satellite (DBS) programs at the same quality they were broadcasted. All D-VHS models have Hi-Fi stereo and are capable of playback and recording on standard VHS tapes.