Raspberrypi-models-and-versions

Here's an overview of the various Raspberry Pi models and versions (aka revisions).

In February 2012 the Raspberry Pi Foundation released Model A and Model B

Model A	Revision	Release date	Comments		Model B	Revision	Release date	Comments
					Raspberry Pi Model B rev1	Rev1	Feb 2012	With Ethernet 512MB RAM 2x USB No Mounting holes
Raspberry Pi Model A	Rev1	Feb 2012	Based on Model B Rev2 P5 Header		Raspberry Pi Model B	Rev2	Feb 2013	P5 Header
Raspberry Pi Model A+ v1.1	Rev1.1	Nov 2014	40 Pin GPIO Composite video now in audio jack		Raspberry Pi Model B+ v1.2	Rev1.2	Jul 2014	40 Pin GPIO Composite video now in audio jack 4x USB