Question: Which company has more subsidiaries under it, American Water or Cisco Systems?
Context: Cisco IOS (originally Internetwork Operating System) is a family of software used on most Cisco Systems routers and current Cisco network switches. " (Earlier switches ran CatOS.)"  IOS is a package of routing, switching, internetworking and telecommunications functions integrated into a multitasking operating system.  Although the IOS code base includes a cooperative multitasking kernel, most IOS features have been ported to other kernels such as QNX and Linux for use in Cisco products or simulators such as Cisco VIRL. The Flip Video cameras are an American series of tapeless camcorders for digital video created by Pure Digital Technologies, a company bought by Cisco Systems in March 2009; variants included the UltraHD, the MinoHD, and the SlideHD.  Flip Video cameras were known for their simple interface with few buttons, minimal menus and built in USB plugs (from which they derived the flip name), and were marketed as making video "simple to shoot, simple to share" Production of the line of Flip video cameras ran from 2006 until April 2011, when Cisco Systems discontinued them as part of a move to "...exit aspects of (their) consumer businesses."  .  Flip cameras contributed to an increase in the popularity of similar pocket camcorders, although the inclusion of HD video cameras in many smartphones has since made them a more niche product. Internet Routing in Space (IRIS) was a program to build a radiation-tolerant IP router created by Cisco Systems for satellite and related spacecraft.  It was a follow-on from Cisco's earlier CLEO router in space on the UK-DMC satellite.  The Cisco Space Router was launched to geostationary orbit on board Intelsat 14 (IS-14), a spacecraft built by Space Systems/Loral for satellite operator Intelsat, in November 2009.  IRIS was evaluated by the United States Department of Defense by way of a JCTD (Joint Capabilities Technology Demonstration).  The Space Router runs Cisco IOS (Internetworking Operating System) software and also contains an onboard Software-defined radio running satellite modem waveforms.  The United States Department of Defense used the JCTD to evaluate the reduced latency, improved throughput and increased flexibility provided by the Space Router. Cisco Systems, Inc. (known as Cisco) is an American multinational technology conglomerate headquartered in San Jose, California, in the center of Silicon Valley, that develops, manufactures and sells networking hardware, telecommunications equipment and other high-technology services and products.  Through its numerous acquired subsidiaries, such as OpenDNS, WebEx, Jabber and Jasper, Cisco specializes into specific tech markets, such as Internet of Things (IoT), domain security and energy management. P-Cube was a service delivery platform company based in the United States, with R&D facilities in Herzliya, Israel.  It was acquired by Cisco Systems on August 23, 2004.  Cisco announced an end of sale of the lower end platforms of the product (now renamed the Service Control Engine or SCE) in October 2012.  Further development of the SCE platform continues and replacements are available from Cisco Systems. Cisco Security Agent (CSA) was an endpoint intrusion prevention system made originally by Okena (formerly named StormWatch Agent), which was bought by Cisco Systems in 2003.  The software is rule-based and examines system activity and network traffic, determining which behaviors are normal and which may indicate an attack.  CSA was offered as a replacement for Cisco IDS Host Sensor, which was announced end-of-life on 21 February 2003.  This end of life action was the result of Cisco's acquisition of Okena, Inc., and the Cisco Security Agent product line based on the Okena technology would replace the Cisco IDS Host Sensor product line from Entercept.  As a result of this end-of-life action, Cisco offered a no-cost, one-for-one product replacement/migration program for all Cisco IDS Host Sensor customers to the new Cisco Security Agent product line.  The intent of this program was to support existing IDS Host Sensor customers who choose to migrate to the new Cisco Security Agent product line.  All Cisco IDS Host Sensor customers were eligible for this migration program, whether or not the customer had purchased a Cisco Software Application Support (SAS) service contract for their Cisco IDS Host Sensor products. American Water is an American public utility company operating in the United States and Canada.  It was founded in 1886 as the American Water Works & Guarantee Company.  In 1914, American Water Works and Guarantee Company became American Water Works and Electric Company.  In 1947 it was reorganized as American Water Works Company, Inc.  The company was a subsidiary of the German-based RWE Group from 2001 to 2008, but the company was divested on April 23, 2008 in an IPO on the NYSE. Metreos was a software company that created and sold development and runtime tools for creating voice over Internet Protocol software applications.  The company was founded by Louis Marascio and Mark Richards and was based in Austin, Texas, United States.  On June 8, 2006 Cisco Systems announced it was acquiring Metreos for $28 million in cash.  On June 30, 2006 the acquisition of Metreos by Cisco Systems was completed. Cisco Press is a publishing alliance between Cisco Systems and Pearson, the world's largest education publishing and technology company which is part of Pearson PLC, the global publisher and co-owner (47%) of Penguin and formerly Financial Times.  Cisco Press distributes its titles through traditional resellers as well as through the Safari Books Online e-reference service.Cisco Press is the Cisco Systems authorized book publisher of Cisco networking technology, Cisco certification self-study, and Cisco Networking Academy Program materials.  Leading authorities from Cisco Systems and other industry innovators write and contribute to the various titles and series that make up the Cisco Press product family.  Products from Cisco Press are part of a recommended learning path from Cisco Systems that combines instructor-led training with hands-on instruction, e-learning, and self-study.  Created By Bryan Hill. Cisco Aironet is a maker of wireless networking equipment currently operated as a division of Cisco Systems.  It was started by ex-Marconi Wireless employees in 1986 as Telesystems SLW in Canada, right after the United States Federal Communications Commission (FCC) opened up the ISM bands for spread spectrum license-free use.  Telxon acquired Telesystems SLW in 1992, and Aironet Wireless Communications was spun off from Telxon's RF Division in 1994.  Cisco Systems acquired Aironet in 1999.
Answer: Cisco Systems