The Raspberry Pi microcomputer has developed a reputation over the last few years for its low price point and compactness; it's about the size of a credit card.
Now, it's even cheaper and even smaller, appealing to would-be programmers and tech enthusiasts on a budget.
The Raspberry Pi A+ starts at $20 and is just 65mm long. One of its predecessors, the Model A, was 86mm for $25.
When the Raspberry Pi was first introduced in 2011, its developers wanted to build a box that ran the Linux operating system for $25. With the A+, they were able to go $5 lower than that original goal.
The latest model has 256MB of RAM and can perform most of a computer's basic functions, like viewing documents and streaming video. You can easily fit the device in your pocket; then, you would just need to connect it to a display.
The developers also claim that the computer consumes less power than previous Raspberry Pi models, with improvements to the computer's micro SD card socket and more GPIO (general purpose input/output) pins, which are used to connect to sensors and expansion boards. The audio circuit board is also designed to be less noisy as the computer operates.
The A+ is a lower-end computer than the original Raspberry Pi. The B+, unveiled in July, offers a few more features (such as more USB ports) at a slightly higher cost of $35.
The Raspberry Pi Foundation is dedicated to getting kids interested in computer science, and the lower cost of the A+ is designed to help more young programmers get their hands on computing devices. The device is available in the United States and the UK.