Microcassette™ - Minicassette

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Both types use standard cassette tape with a width of 3.81mm.

Drive System:
Capstan - MICROCASSETTE™;
Reel drive - MINICASSETTE.

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Medical Transcription: Historic Overview
Source: American Health Information Management Association (AHIMA) Module

Two other cassette tape sizes were introduced in the late 1970s; the minicassette (2 1/4" x 1 1/2") and the microcassette™ (2" x 1 1/2").
The microcassette quickly became more popular of the smaller cassettes, being compatible with the new hand-held dictation  units utilized by many physicians, although all three sizes of cassette tapes are still in use today.

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http://www.olympusamerica.com/

1969
Introduces the Zuiko Pearlcorder, the world's first Microcassette™ tape recorder.

1979
Introduces Microcassette™ transcribers.

1988
Introduces transcribers with Microcassette™ systems for the European market.

Olympus was the original manufacturer of the Microcassette™ recorder back in 1969.
And Sony developed the 90 minute microcassette™.
 

 

MC-1

MC-5

MC-15

MC-20

MC-30

MC-60

MC-80

MC-90

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http://www.speech.philips.com/

The Philips Dictation Systems Story

Formerly marketed in the United States under the Norelco brand name, Philips has become a name to depend on for quality dictation equipment. The home office for dictation products is in Austria. Products are made in Austria and have a higher level of quality than our competitor’s Asian products.

History of Mini-cassette Dictation:
Norelco (1967- 1992) to Philips (1992-Present)