What types of organizations are there?

Answer 1

In general terms there are three:

1. Pipe organ

2. Reed organ

3. Electronic organ

These can be sub divided. For instance:

There are four major types of pipe organs: Church, theater, concert and residence.

There are six major styles of classical pipe organ building. Germanic, French, Italian, Spanish, English and American which can be further sub-divided according to specific regions, time and time period.

There are also hybrid organs which are combination pipe / electronic.

Hammond "tone wheel" organs are technically electro-mechanical organs because their tone generators consist of arrays of rotating wheels.