Mobile operating system
It was the debut of what was later dubbed the Windows Mobile operating system, and meant to be a successor to the operating system aboard Palm-size PCs. It retained backwards compatibility with such Palm-size PC applications. Pocket PC 2000 was intended mainly for Pocket PC devices; however, several Palm-size PC devices had the ability to be updated also. While, several Pocket PC 2000 phones were released, Microsoft's smartphone hardware platform was not yet created. The only resolution supported by this release was 240×320 (QVGA). Removable storage card formats that were supported were CompactFlash and MultiMediaCard. At this time Pocket PC devices had not been standardized with a specific CPU architecture. As a result, Pocket PC 2000 was released on multiple CPU architectures; SH-3, MIPS, and ARM. Infrared (IR) File beaming capability was among the original hardware features.