1. Get Started with Raspberry Pi- Single Board Computer

2. Raspberry pi is a very small computer which is very useful in DIY projects. For $35, You can get model A or B with HDMI and composite Video output. A big news is that raspberry pi zero is released for just $5. You can add up more USB devices. You can make your own VPN server with the raspberry pi.

3. Block diagram of Raspberry Pi Model

4. Raspberry pi Models @bestoninternet

5. Raspberry pi Model A Single USB port 26 Pin GPIO header No Ethernet 3.5mm audio jack 256MB SDRAM @bestoninternet

6. Raspberry pi Model B 2 USB ports 512 MB SDRAM One Ethernet port 256MB SDRAM 3.5mm audio jack @bestoninternet

7. Raspberry pi Model A+ Single USB port 40 Pin GPIO header No Ethernet 256MB SDRAM Smaller form factor @bestoninternet

8. Raspberry pi Model B+ 4 USB ports 40 Pin GPIO header 3.5mm audio/video jack Ethernet @bestoninternet