The definition of Personal Java

Personal Java - (P-Java) - A Java application environment developed by Sun Microsystems specifically for consumer appliances. It has been superseded by other technologies but still is in use.

http://en.wikipedia.org/wiki/Personal_Java

It was originally designed to be used with telephones, TVs, set-top boxes, game consoles, network computers, smart telephones and various other smart consumer appliances. Personal Java is an application environment specifically designed for building network-connectable consumer devices. It's comprised of the Java Virtual Machine™ (JVM) and a subset of the Java Application Programming Interface (API), including core and optional APIs and class libraries. Also see J2ME.