The BeagleBone Black, a Texas Instruments-powered SBC, is a member of the BeagleBoard family of development boards. By featuring TI's low-cost Sitara AM335x ARM Cortex-A8 microprocessor, the BeagleBone Black intends to offer developers a cost-effective solution for builds requiring a plethora of expansion options such as add-on boards. As most development boards of its kind, the BBB supports most Linux distributions and comes with the Angstrom distribution pre-installed.
The BeagleBone Black is equipped with 256 MB x 16 DDR3L SDRAM (4 GB), 32 kB EEPROM, and 2 GB eMMC flash as the primary boot source. An onboard microSD slot can also be used for booting and memory storage in addition to the provided serial and USB booting modes. Other onboard interfaces include HDMI, 10/100 Ethernet, serial (for debugging), PC USB, USB 2.0 host port, EtherCAT, and Profibus. Some key applications of the BBB have included motor drives, data backup, data acquisition, robotics, and Twitter printers.
It's a step up from the Raspberry Pi, with quite robust OS support and expansion options.