This was used in manufacturing companies such as Rolls-Royce plc, British Steel Corporation and various government departments including providing data capture for the DHSS at Newcastle upon Tyne.

[citation needed] 1992 was the last year MDIS made a computer system from scratch, which meant the end of UK manufacturing.

This was the result of several years of development taking the Reality operating system (ROS) and re-engineering into a Unix application capable of running on non-MDIS computers.

The open approach eventually led to a Microsoft Windows platform in 1995 and continued feature enhancements that are still being developed as of 2007[update].

As a corollary to this operating environment, MDIS acquired and developed its PROIV fourth-generation language (4GL), which was used worldwide by companies including Fujitsu.

The company re-focused on its core, local Government and Public Sector (police, fire, and ambulance) markets and application products (Payroll, Pensions and HR systems).

in 2005, Sx3 and MVM Holdings were acquired; however, a number of the old Northgate staff now felt that they were working for Sx3 due to the integration of their senior managers.

NorthgateArinso in 2011 and 2012 was acknowledged in HR and payroll outsourcing by industry analysts such as Gartner, IDC and Everest Research.

Northgate chairman at the time, Ron Mackintosh said the offer from KKR was good value and he predicted a bright future for the firm under private-equity ownership.

In 2017, NGA HR (payroll service organization From Northgate Information Solutions) announced that it had sold its UK Mid-Market and UK SME sections to Bain Capital to focus on the growing demand from enterprise businesses for multi-country HR and payroll services.

[5] The company acquired service design agency Snook in June 2019[6] and criminal justice software provider i2N in August 2018.

[7] It was announced in January 2018 that following Bain Capital's acquisition of NGA HR's UK and Ireland division, they would rebrand as a separate company providing payroll services under the new name Zellis.

[8] The company acquired APD Communications, a software supplier to the emergency services, public safety and control room markets in January 2019[9] and the specialist and care division EMIS Health in April 2019.

On Sunday, 11 December 2005, a major explosion and fire at the Buncefield oil depot immediately adjacent to the NIS building, effectively destroyed the Hemel Hempstead Head office complex.

[19] In March 2008, Northgate Information Systems plc was de-listed from the London Stock Exchange following the completion of the purchase by KKR.

NEC Software Solutions UK operates in four sectors – Government, Healthcare, Housing and Public Safety.

It also works with UK local authorities, providing specialist applications and services to support the management of revenues and benefits, housing, environment and planning functions.

[22] This division covers the company's work in policing, emergency services, prisons, probation and critical infrastructure.

Products include the CONNECT police platform as well as software supporting offender management, youth justice and major control rooms.

In March 2020, subsidiary company APD Communications secured a contract to support the UK Home Office Emergency Services Network.

[23] In 2019, NEC Corporation also transferred global sales responsibility for its facial recognition product NeoFace Watch to this division.