What is programming software and what would be an example of this type of software

Practical computer systems divide software systems into three major classes: system software , programming software and application software
System Software - The purpose of systems software is to unburden the applications programmer from the details of the particular computer complex being used, including such accessory devices as communications, printers, readers, displays, keyboards, etc. And also to partition the computer's resources such as memory and processor time in a safe and stable manner.
Programming Software - programming software usually provides tools to assist a programmer in writing computer programs, and software using different programming languages in a more convenient way.
Application Software - application software allows end users to accomplish one or more specific (not directly computer development related) tasks. Applications include - Business Software, Computer Games, Telecommunications i.e the internet and everything that flows on it. Databases, Educational Software and Medical Software