Dictionary

16: Any record that plays at 16 2/3 RPM; these were usually used for radio transcription discs or narrated publications for the blind. They were never commercially available, but some turntables have the 16 RPM setting.

45: Any record that plays at 45 revolutions per minute; usually used for single-playing records. It usually had a large center hole for playing in jukeboxes.

78: A record that plays at 78 revolutions per minute, like the fragile records used in old gramophones.

air pumps: A method of fixing a warped records which creates suction that pulls the record flat on the turntable platter. Since this is a costly feature, it is usually found on high-end turntables.

alternate versions: Albums that may have different tracks, jackets or even colors than the normal album that was distributed. This may increase the value of the album.

anti-static sleeve: A method of storing records that reduces dust accumulation.

Bones: A specific type of record made in the former USSR with discarded medical X-rays. Some of these were inscribed with music banned by the government, and were often used to distribute music in the Soviet states.

diminished: When a value of a record decreases due to its mass distribution.

disc clamps: A way of fixing warped records using certain clamps that flatten the LP against the turntable.

donut: A 12-inch single-play record album that plays at 45 rpm and is a hit with collectors.