Question: What UK water company is listed among the big-name customers of the Polyhedra database management system?

full_context: Document 1: United Utilities: United Utilities Group PLC (UU), the United Kingdom's largest listed water company, was founded in 1995 as a result of the merger of North West Water and NORWEB.
Document 2: North British and Mercantile Insurance: The North British and Mercantile Insurance Company was a British-based company founded in 1809 in Edinburgh and absorbed as a subsidiary of the Commercial Union in 1959. The company was also known as the North British Insurance Company, North British Fire Office and North British Fire Insurance Company.
Document 3: Norwich Union: Norwich Union was the name of insurance company Aviva's British arm before June 2009. It was originally established in 1797. It was listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index.
Document 4: Relational database management system: A relational database management system (RDBMS) is a database management system (DBMS) that is based on the relational model invented by Edgar F. Codd, of IBM's San Jose Research Laboratory. As of 2017, many of the databases in widespread use are based on the relational database model.
Document 5: Unitil Corporation: Unitil Corporation is an interstate electricity and natural gas utility company that serves the areas in New Hampshire, Massachusetts and Maine. Its earliest predecessor company, the Portland Gas Light Company, was founded in Maine in 1849. The current company was set up in 1984 and is based in New Hampshire. It provides electric services to about 102,400 customers and natural gas to over 75,900 customers. The service territory of Unitil includes business districts and recreational centers as well as commercial and industrial business, such as electronic component manufacturers and education institutes. The company has an enterprise value of $766.54 million. The non-utility business is operated through the company’s subsidiary, U-source, which is a national energy brokering and advice company.
Document 6: MICRO Relational Database Management System: The MICRO Relational Database Management System was the first large-scale set-theoretic database management system to be used in production. Though MICRO was initially considered to be an "Information Management System", it was eventually recognized to provide all the capabilities of an RDBMS. MICRO's major underpinnings and algorithms were based on the Set-Theoretic Data Structure (STDS) model developed by D. L. Childs of the University of Michigan's CONCOMP (Conversational Use of Computers) Project. MICRO featured a natural language interface which allowed non-programmers to use the system.
Document 7: Column-oriented DBMS: A column-oriented DBMS (or columnar database management system) is a database management system (DBMS) that stores data tables by column rather than by row. Practical use of a column store versus a row store differs little in the relational DBMS world. Both columnar and row databases can use traditional database query languages like SQL to load data and perform queries. Both row and columnar databases can become the backbone in a system to serve data for common extract, transform, load (ETL) and data visualization tools. However, by storing data in columns rather than rows, the database can more precisely access the data it needs to answer a query rather than scanning and discarding unwanted data in rows. Query performance is often increased as a result, particularly in very large data sets.
Document 8: Anglian Water: Anglian Water is a water company that operates in the East of England. Anglian Water is regulated under the United Kingdom Water Industry Act 1991.
Document 9: Whittle Dene: A major need for piped water within Newcastle was for fire-fighting, and it was a local insurance company, the Newcastle Fire Office, which provided some of the earliest water supply points. The fire office obtained much of its water from flooded colliery workings in the Coxlodge area, the water being pumped out by a windmill and run via a brick conduit to a reservoir on the Town Moor. Better-planned proposals led to the Whittle Dene Water Company being established in 1845. Reservoirs were planned at Whittle Dene above the village of Ovingham. These reservoirs, completed in 1848, at last gave Newcastle and Gateshead a steady, clean and regular supply of water. At this point the major works of the new company were completed and later described as ‘the greatest step with reference to the hydraulic supply of a Town that has been taken in the Kingdom’. Following those early beginnings the Newcastle and Gateshead Water Company came into being, gradually extending its area of supply and increasing its supply points.
Document 10: Polyhedra DBMS: Polyhedra is a family of relational database management systems offered by ENEA AB, a Swedish company. The original version of Polyhedra (now referred to as Polyhedra IMDB) was an in-memory database management system which could be used in high availability configurations; in 2006 Polyhedra Flash DBMS was introduced to allow databases to be stored in flash memory. All versions employ the client–server model to ensure the data are protected from misbehaving application software, and they use the same SQL, ODBC and type-4 JDBC interfaces. Polyhedra is targeted primarily for embedded use by Original Equipment Manufacturers (OEMs), and big-name customers include Ericsson, ABB, Emerson, Lockheed Martin, United Utilities and Siemens AG.
Document 11: Uu-a-thluk: Uu-a-thluk means "taking care of" in the Nuu-chah-nulth language spoken on the west coast of Vancouver Island and is the Nuu-chah-nulth aquatic management organization. This organization was established with financial support from the federal government in recognition of the need to manage aquatic resources wisely together with the many sectors and interests working in the area. The philosophy that drives the organization is the idea that working cooperatively with other governments, communities and individuals is required to achieve sustainable and fruitful management (Uu-a-thluk, 2008a).
Document 12: Object-relational database: An object-relational database (ORD), or object-relational database management system (ORDBMS), is a database management system (DBMS) similar to a relational database, but with an object-oriented database model: objects, classes and inheritance are directly supported in database schemas and in the query language. In addition, just as with pure relational systems, it supports extension of the data model with custom data-types and methods.
Document 13: Empress Embedded Database: Empress Embedded Database is a relational database management system that has been embedded into applications, including medical systems, network routers, nuclear power plant monitors, satellite management systems. Empress is an ACID compliant relational database management system (RDBMS) with two-phase commit and several transaction isolation levels for real-time embedded applications. It supports both persistent and in-memory storage of data and works with text, binary, multimedia, as well as traditional data.
Document 14: Northern Ireland Water: Northern Ireland Water Limited (Irish: "Uisce Thuaisceart Éireann" ; Ulster-Scots: "Norlin Airlan Wattèr") is a water company in Northern Ireland. Formerly an executive agency (the Northern Ireland Water Service) within Northern Ireland's former Department for Regional Development, it became a government-owned company on 1 April 2007. The company provides 625 million litres of clean water a day for almost 1.7 million people as well as treating 134 million m of wastewater every year, and has approximately 1,400 staff. It is responsible for 26,500 km of watermains and 14,500 km of sewerage mains, as well as 47 water treatment works and 918 wastewater treatment works. In 2005, the Water Service had an annual budget of £302 million and fixed assets of £4.9 billion.
Document 15: Sybase iAnywhere: Sybase iAnywhere, is a subsidiary of Sybase specializing in mobile computing, management and security and enterprise database software. SQL Anywhere, formerly known as SQL Anywhere Studio or Adaptive Server Anywhere (ASA), is the company's flagship relational database management system (RDBMS). SQL Anywhere powers popular applications such as Intuit, Inc.'s QuickBooks, and the devices of 140,000 census workers during the 2010 United States Census. The product's customers include Brinks, Kodak, Pepsi Bottling Group (PBG), MICROS Systems, Inc. and the United States Navy. In August 2008.
ground_truth: United Utilities Group PLC