Page "Fourth-generation programming language" Paragraph 12

The development of the 4GL was influenced by several factors, with the hardware and operating system constraints having a large weight.

When the 4GL was first introduced, a disparate mix of hardware and operating systems mandated custom application development support that was specific to the system in order to ensure sales.

One example is the MAPPER system developed by Sperry.

Though it has roots back to the beginning, the system has proven successful in many applications and has been ported to modern platforms.

The latest variant is embedded in the BIS offering of Unisys.

MARK-IV is now known as VISION: BUILDER and is offered by Computer Associates.