The Cassiopeia BE-300 Pocket Manager was a personal digital assistant manufactured by Casio Computer Co. Ltd and first released June 25, 2001.

It featured a 32 thousand colors 320×240 touch-screen LCD, a 166 MHz MIPS CPU, and 16 MB of RAM.

It was also equipped with a CompactFlash slot, allowing for the expansion of internal memory with external flash memory cards as well as the use of peripheral CF-compatible devices such as wireless and network adapters.

[3] In the general press it received modestly positive reviews.

[4][5] The BE-300 was reasonably hackable and a community grew up dedicated to modifying it.