Palm-size PC (PsPC) was Microsoft's official name for Windows CE PDAs that were smaller than Handheld PCs by the lack of a physical keyboard. The class was announced in January 1998 originally as "Palm PC" which provoked a lawsuit by Palm Inc., and the name changed soon afterwards to Palm-size PC before release. These devices were similar to the Handheld PC and also ran Windows CE, however this version was more limited and lacked Pocket Microsoft Office, Pocket Internet Explorer, ActiveX and some other tools. Its main competitor was the PalmPilot and Palm III. According to the specification, Palm-size PCs use SuperH SH3 processors and MIPS architecture. The term "palm-sized PC" was also used as a generic term of similar such devices that are not necessary connected to Microsoft, such as the PalmPilot.