BS2000 is an

operating system An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may also i ...

for IBM 390-compatible mainframe computers developed in the 1970s by Siemens (Data Processing Department EDV) and from early 2000s onward by

Fujitsu Technology Solutions Fujitsu Technology Solutions is a European information technology vendor with a presence in markets in Europe, the Middle East, Africa, as well as India. A subsidiary of Fujitsu Limited headquartered in Tokyo, Japan, FTS was founded in 2009 after ...

. Unlike other mainframe systems, BS2000 provides exactly the same user and programming interface in all operating modes (batch, interactive and online transaction processing) and regardless of whether it is running natively or as a guest system in a

virtual machine In computing, a virtual machine (VM) is the virtualization/ emulation of a computer system. Virtual machines are based on computer architectures and provide functionality of a physical computer. Their implementations may involve specialized h ...

. This uniformity of the user interface and the entire BS2000 software configuration makes administration and automation particularly easy. Currently, it is mainly used in Germany - making up to 83% of its total user base - as well as in the United Kingdom (8%), Belgium (4,8%) and other European countries (4,2%).

History

BS2000 has its roots in the

Time Sharing Operating System Time Sharing Operating System, or TSOS, is a discontinued operating system for RCA mainframe computers of the Spectra 70 series. TSOS was originally designed in 1968 for the Spectra 70/46, a modified version of the 70/45. TSOS quickly evolved in ...

(TSOS) first developed by

RCA The RCA Corporation was a major American electronics company, which was founded as the Radio Corporation of America in 1919. It was initially a patent trust owned by General Electric (GE), Westinghouse, AT&T Corporation and United Fruit Comp ...

for the /46 model of the Spectra/70 series, a computer family of the late 1960s related in its architecture to IBM's /360 series. It was an early operating system which used

virtual address In computing, a virtual address space (VAS) or address space is the set of ranges of virtual addresses that an operating system makes available to a process. The range of virtual addresses usually starts at a low address and can extend to the hig ...

ing and a segregated address space for the programs of different users. From the outset TSOS also allowed data peripherals to be accessed only via record- or block-oriented file interfaces, thereby preventing the necessity to implement device dependencies in user programs. The same operating system was also sold to Sperry Univac when it bought most of RCA's computer division. Univac's "

fork In cutlery or kitchenware, a fork (from la, furca 'pitchfork') is a utensil, now usually made of metal, whose long handle terminates in a head that branches into several narrow and often slightly curved tine (structural), tines with which one ...

" of TSOS would become

VS/9 VS/9 is a computer operating system for the UNIVAC Series 90 mainframes (90/60, 90/70, and 90/80), used during the late 1960s through 1980s. The 90/60 and 90/70 were repackaged Univac 9700 computers. After the RCA acquisition by Sperry, it ...

, which used many of the same concepts.

1970s

In 1973, BS2000 V1.0 was a port of the TSOS operating system to models of the Siemens system 7.700BS2000/OSD V8.0 - New Technologies for Data Centers
/ref> In June 1975, Siemens shipped the enhanced BS2000 V2.0 version of the TSOS operating system for the models of the Siemens 7.700 mainframe series for the first time under the name BS2000. This first version supported disk paging and three different operating modes in the same system: interactive dialog, batch, and transaction mode, a precursor of

online transaction processing In online transaction processing (OLTP), information systems typically facilitate and manage transaction-oriented applications. This is contrasted with online analytical processing. The term "transaction" can have two different meanings, both of w ...

. In 1977, the TRANSDATA communication system used

computer networking A computer network is a set of computers sharing resources located on or provided by network nodes. The computers use common communication protocols over digital interconnections to communicate with each other. These interconnections are ...

. In 1978,

multiprocessor Multiprocessing is the use of two or more central processing units (CPUs) within a single computer system. The term also refers to the ability of a system to support more than one processor or the ability to allocate tasks between them. There ar ...

technology was introduced. The operating system had the ability to cope with a processor failure. At the same time the new technology considerably extended the performance range of the system. In 1979, a

transaction processing monitor Transaction processing is information processing in computer science that is divided into individual, indivisible operations called ''transactions''. Each transaction must succeed or failure, fail as a complete unit; it can never be only partial ...

, the ''Universal Transaction Monitor'' (UTM), was introduced, providing support for online transaction processing as an additional operating mode.

1980s

In 1980, Siemens introduced the system 7.500 hardware family, ranging from desk size models for use in office environments to large models with water cooling. In 1987, BS2000 V9.0 was ported to the /370 architecture supported 2GB address spaces, 512 processes and the XS channel system (Dynamic Channel Subsystem). BS2000 was subdivided into subsystems decoupled from one another.

1990s

With the advent of the

VM2000 VM 2000 is a hypervisor from Fujitsu (formerly Siemens Nixdorf Informationssysteme) designed specifically for use with the BS2000 operating system. It is an EBCDIC-based operating system. It allows multiple images of BS2000 and Linux to operate ...

virtual machine in 1990, multiple BS2000 systems, of the same or different versions, can run in parallel on the same computer. The hierarchical storage management system (HSMS) swapped out infrequently used data to cheaper storage media. When the data is needed again, it is restored to high-speed access media. The ROBAR tape archiving system supported robot systems. In 1991, the

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evaluation to F2/Q3 was completed. From 1992 through 1995, BS2000/OSD V1.0 was made open to application software and was renamed BS2000/OSD (Open Server Dimension). Full support of the XPG4 standard was achieved in 1995 after the porting of the

POSIX The Portable Operating System Interface (POSIX) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems. POSIX defines both the system- and user-level application programming inter ...

interfaces in 1992. In 1996, BS2000/OSD was ported to the

MIPS architecture MIPS (Microprocessor without Interlocked Pipelined Stages) is a family of reduced instruction set computer (RISC) instruction set architectures (ISA)Price, Charles (September 1995). ''MIPS IV Instruction Set'' (Revision 3.2), MIPS Technologies, ...

. Although the operating system ran on different hardware architectures (S servers with /390 architecture and SR2000 servers for the MIPS architecture), applications produced for /390 can be used on computers based on MIPS architecture without recompilation due an emulation layer for legacy code. In 1997, WebTransactions allowed applications to use the

Internet The Internet (or internet) is the global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to communicate between networks and devices. It is a '' network of networks'' that consists of private, pub ...

. In 1999, BS2000/OSD was the first operating system to be awarded Internet Branding by

The Open Group The Open Group is a global consortium that seeks to "enable the achievement of business objectives" by developing "open, vendor-neutral technology standards and certifications." It has over 840 member organizations and provides a number of servi ...

2000s

In 2002, BS2000/OSD was ported to the

SPARC SPARC (Scalable Processor Architecture) is a reduced instruction set computer (RISC) instruction set architecture originally developed by Sun Microsystems. Its design was strongly influenced by the experimental Berkeley RISC system develope ...

architecture, leading to the Fujitsu Siemens Computers' SX server line. In 2004, support for

storage area network A storage area network (SAN) or storage network is a computer network which provides access to consolidated, block-level data storage. SANs are primarily used to access data storage devices, such as disk arrays and tape libraries from ser ...

s based on Fibre Channel technology was introduced. In 2006, BS2000/OSD V7.0 introduced support for new server generations,

Unicode Unicode, formally The Unicode Standard,The formal version reference is is an information technology standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems. The standard, wh ...

support, and improved SAN integration. In 2008, BS2000/OSD was ported to the

x86 architecture x86 (also known as 80x86 or the 8086 family) is a family of complex instruction set computer (CISC) instruction set architectures initially developed by Intel based on the Intel 8086 microprocessor and its 8088 variant. The 8086 was int ...

, and the SQ server line was introduced.BS2000/OSD V8.0A Release Notice
November 2010

2010s

In 2012, BS2000/OSD version 9.0 was released. Pilot release of version 10.0 started in November 2014, and it was released in May 2015. Pilot release of version 11.0 started in March 2017, and it was released in July 2017.

2020s

Pilot release of version DX V1.0(v21.0) started in March 2021, and it was released in July 2021.

References

External links

BS2000 Mainframes

BS2000 Operating System

BS2000 Documentation

BS2000 Germany
{{DEFAULTSORT:Bs2000 1975 software Proprietary operating systems Mainframe computers MIPS operating systems