Albert Einstein He developed the general theory of relativity, one of the two pillars of modern physics (alongside quantum mechanics).

The first integrated circuit invented by the engeneer Jack S. Kilby1 (1923-2005) contained only a few transistors. Texas Instruments.

Arduino Shields

Xbee - communicate wirelessly
XBee’s won’t get you connected to the Internet, but they do provide a solid, cheap means for communicating wirelessly. You could use an XBee to wirelessly trigger coffee machines, sprinklers, lights, or other household appliances.
ProtoShield Kit
The self-titled star of this category. This shield is basically a big prototyping area. You can stick a mini-breadboard on top, or just solder directly to the shield’s prototyping area.
Arduino Ethernet Shield
This is one of the more classic shields. The Ethernet Shield supplies your Arduino with an ability to connect to the world wide web. There’s a great library to support it as well.
Color LCD Shield
Equip your Arduino with a unique 128x128 cellular phone color LCD.
Ardumoto Motor Driver Shield
This classic motor driver shield can control two DC motors.
MP3 Player Shield
Turn your Arduino into an MP3 player. Just plug in a µSD card, add some speakers, upload the example code, and you can make your very own MP3 Playing Music Box