Macintosh Quadra

The Macintosh Quadra is a family of personal computers designed, manufactured, and sold by Apple Computer, Inc. from October 1991 to October 1995. Named after the number four in the Motorola 68040 central processing unit, the Quadra succeeded the Macintosh II family as Apple's high-end Macintosh line, positioned above the entry-level LC series and mid-range Centris models.

The family was introduced with the Quadra 700 and 900 towers in October 1991 and expanded to include minitower and pizza box form factors, along with the multimedia-oriented 840AV. In October 1993, Apple merged the Centris line into the Quadra family, and extended the line into lower-priced market segments. Following the introduction of the Power Macintosh line in 1994, the Quadra family was gradually discontinued, with the 950 remaining in production until October 1995.