IMP stands for the Information Module Profile. It is a specification put out by Sun Microsystems

Sun Microsystems

Sun Microsystems, Inc. was a company that sold :computers, computer components, :computer software, and :information technology services. Sun was founded on February 24, 1982...

 for the use of Java

Java (programming language)

Java is a programming language originally developed by James Gosling at Sun Microsystems and released in 1995 as a core component of Sun Microsystems' Java platform. The language derives much of its syntax from C and C++ but has a simpler object model and fewer low-level facilities...

 on embedded devices with very limited displays. It is a subset of the Mobile Information Device Profile.

IMP is part of the Java ME framework

Software framework

In computer programming, a software framework is an abstraction in which software providing generic functionality can be selectively changed by user code, thus providing application specific software...

.

Typical Requirements

• 128 kilobytes for the Java platform
• 8 kilobytes for persistent data
• 32 kilobytes for the Java runtime

General APIs

The core APIs are defined by the underlying Configuration CLDC

Connected Limited Device Configuration

The Connected Limited Device Configuration is a specification of a framework for Java ME applications describing the basic set of libraries and virtual-machine features that must be present in an implementation...

.

javax.microedition.io

Contains the Java 2 Platform, Micro Edition specific classes used for I/O operations.

javax.microedition.rms

Provides a form of persistent storage for Java 2 Platform, Micro Edition.

javax.microedition.midlet

Contains the base classes for Java 2 Platform, Micro Edition applications.