HP HPE NonStop NSK Himalaya Tandem Date Timeline

The HP NonStop (originally Tandem) timeline spans over 50 years of evolution in fault-tolerant computing, beginning with the vision of James Treybig and transitioning through several major corporate owners. 

Founding and Initial Growth (1974–1980s)

  • 1974: Tandem Computers Incorporated is founded by James (Jimmy) Treybig in Cupertino, CA.
  • 1976: The first NonStop I (T/16) servers are shipped to Citibank, introducing the “fail-fast” architecture.
  • 1981: NonStop II is introduced, adding 32-bit addressing support to the 16-bit registers.
  • 1983: NonStop TXP (Tandem Extended Processor) debuts, featuring the first use of cache memory and a native Transaction Monitoring Facility (TMF).
  • 1986: NonStop VLX (Very Large eXtension) is released, introducing 32-bit data paths and the first fault-tolerant SQL database, NonStop SQL.
  • 1987: NonStop CLX is launched as a low-cost, office-ready minicomputer system.
  • 1989: NonStop Cyclone is introduced for high-end mainframe workloads, alongside the Integrity line of Unix-based servers. 

Architecture Transitions (1990s–2000s)

  • 1991: Cyclone/R (CLX/R) marks the start of the TNS/R migration to MIPS microprocessors.
  • 1993: NonStop Himalaya K-series is released, featuring native-mode Guardian OS on MIPS R4400 processors.
  • 1994: Open System Services (OSS) adds a POSIX-compliant environment to the NonStop Kernel.
  • 1997: NonStop Himalaya S-Series introduces ServerNet, replacing older bus technologies with high-speed point-to-point connections.
  • 1997: Compaq acquires Tandem Computers to bolster its high-end enterprise server offerings.
  • 2002: Hewlett-Packard (HP) acquires Compaq, bringing Tandem technology under the HP banner as the NonStop Enterprise Division.
  • 2005: The HP Integrity NonStop (TNS/E) series is launched, migrating the architecture from MIPS to Intel Itanium processors. 

The Modern Era (2010s–Present)

  • 2014: NonStop X (TNS/X) is introduced, transitioning the platform to standard Intel x86-64 processors.
  • 2015: HP splits into HP Inc. and Hewlett Packard Enterprise (HPE); the NonStop line moves to HPE.
  • 2017: Virtualized NonStop (vNS) is introduced, allowing the system to run in software-defined data centres and cloud environments.
  • 2020: HP ends sales of Itanium-based systems in July, completing the transition to the x86 platform.
  • 2024: The NonStop community celebrates 50 years of Tandem/NonStop technology. 
HP HPE NonStop NSK Himalaya Tandem Date Timeline
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Author: Mark Whitfield

Welcome to my site! After graduating in Computing in 1990, I accepted a position as a programmer at a Runcorn based software house specialising in electronic banking software, namely sp/ARCHITECT-BANK on Tandem Computers (now HPE NonStop). This was before the internet became more prevalent and so the notion of enabling desktop access to company accounts for inter-account transfers and book keeping was still quite a cutting edge idea (and smartphones only ever hinted at in Space 1999). The company was called The Software Partnership (which was taken over by Deluxe Data in 1994). I spent 5 years in Runcorn developing code for SP/ARCHITECT for various banks like TSB, Bank of Scotland, Rabobank and Girofon (Denmark) to name but a few. I then moved onto a software house in Salford Quays for further bank facing projects. After a further 23 years in the IT industry and now a Senior IT Project Manager (both Agile and Waterfall delivery), I thought I would echo out my Career Profile in this corner of the internet for quick and easy access.

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