1. Carousel Changers

The most common consumer version. These featured a large, rotating platter that usually held 5 or 6 discs.

• The "Play-and-Exchange" Feature: Most carousels allowed you to open the drawer and swap out four discs while the fifth one was still playing.
• Reliability: These were generally very reliable because the movement was simple rotation.

2. Magazine (Cartridge) Changers

Common in car stereos and early home units. You would load 6 to 10 discs into a plastic "magazine," which was then shoved into the player.

• The Mechanism: A small mechanical "finger" would pull a specific tray out of the magazine and drop it onto the spindle for playback.
• Portability: You could have multiple magazines (e.g., one for Rock, one for Jazz) and swap them in seconds.

3. Mega-Changers (The "Jukebox")

For the serious collector, brands like Sony and Pioneer released "Mega-Storage" units that could hold hundreds of discs (often 200, 300, or even 400).

• The "Rolodex" Design: Discs were stored vertically in a giant internal circular rack. The laser assembly would move along a rail to the specific slot requested.
• Management: Since you couldn't see the discs, these players often allowed you to plug in a computer keyboard to type in the names of artists and albums so they would appear on the small LCD screen.