4690 Operating System

In 2012, IBM sold its retail business, including this product, to Toshiba, which assumed support.

[2] The original 4680 OS was based on Digital Research's Concurrent DOS 286,[3] a system thereafter renamed to FlexOS 286 in November 1986.

In 2018, a Linux-based successor of 4690 OS, named TCx Sky and codeveloped with Wind River Systems, was launched.

The family of IBM Universal Serial Bus (USB) POS devices that 4690 supports includes keyboards, displays, and cash drawers.

When connected in a local area network (LAN), these 4690 store controllers provide redundant backup using mirrored data files.

[7] 4690 OS has been updated annually to address the needs of its user community and in anticipation of upcoming requirements.

Another recent addition to 4690 was the ability to forward store hardware- and software-level events to a Remote Management system to facilitate central control and monitoring.

File integrity monitoring and lockdown of 4690s are becoming increasingly important due to recent breaches caused by point-of-sale malware based threats.

4690 supports applications written in a CBASIC variant named IBM 4680 BASIC, Metaware High-C, and Java 2.

The base operating system that runs under 4690 OS itself was changed to Wind River Linux with this revision.