Computer software (or simply software) is the programs and procedures that enable a computer to perform a specific task, as opposed to the physical components of the system (hardware). This includes application software such as a word processor, which enables a user to perform a task, and system software such as an operating system, which enables other software to run properly, by interfacing with hardware and with other software.
The term "software" was first used in this sense by John W. Tukey in 1957. In computer science and software engineering, computer software is all information processed by computer systems, programs and data. The concept of reading different sequences of instructions into the memory of a device to control computations was invented by Charles Babbage as part of his difference engine. The theory that is the basis for most modern software was first proposed by Alan Turing in his 1935 essay Computable numbers with an application to the Entscheidungsproblem. Hally, Mike (2005:79). Electronic brains/Stories from the dawn of the computer age. British Broadcasting Corporation and Granta Books, London. ISBN 1-86-207663-4.
Software :: Products and Services

Anderson-Hydro - Offers the arid lands hydrology model (AHYMO) program for computing hydrographs and sediment yield in applications such as analysis of storm sewers.
BOSS International - Catalog of software for solving problems in hydrology, hydraulics, surface water or groundwater modeling, regional watershed hydrology, water distribution, stormwater, wastewater, and terrain modeling.
Meta Description: [ World's largest distributor of ground water modeling, storm water modeling, watershed modeling, surface water modeling, terrain modeling software. ]
ECES Group - Offers environmental engineering software. Products provide steady state simulation of several different wastewater treatment processes.
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Eichert Engineering - Purchase, support, and training for the industry standard HEC-5 hydrologic software, which simulates the operation of a reservoir system for flood control, hydropower, and water supply.
Environmental Modeling Systems, Inc - GMS, SMS WMS, provide user-friendly, graphical user interfaces for industry-standard numerical models in groundwater, surface-water, and watershed modeling applications.
Meta Description: [ EMS-I is the head distributor of software, support, training, and consulting services for water resources modeling using the Groundwater Modeling System (GMS Software), Surface-water Modeling System (SMS Software), and Watershed Modeling System (WMS Software). ]
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FLOWatch - Operations software for data monitoring and analytical services for water treatment plants using membrane technology.
Hydromantis Inc. - Offers GPS-X software, a modeling and simulation software for wastewater treatment plants.
Meta Description: [ Hydromantis is a world-class consulting engineering and software firm providing wastewater and water treatment solutions. ]
Linko Industrial Pretreatment Software - Modular software for industrial pretreatment tracking.
Meta Description: [ Linko also offers easy to use and highly functional FOG software. LinkCTS wastewater industrial pretreatment compliance tracking software for the wastewater industry. LinkoCTS is state-of-the-art, wastewater software that is an ideal fit for any Wastewater Pretreatment program, large or small.... ]
Municipal Solutions Ltd. - Manufacturer and supplier of access control hardware and billing software for bulk water truck fill stations and wastewater/septage receiving stations.
Meta Description: [ Municipal Solutions is a privately owned manufacturer and distributor of bulk water distribution systems, septage receiving systems, and access and billing software. ]
RGM HEC2000 - Offers Windows based interactive graphical interface software for HEC-1, used for storm water, water resources, water quality and flood flow computations.
Meta Description: [ New Inexpensive Graphical Interface for HEC-1 in the fields of hydrology watershed modeling flood stormwater water resources hec-1 hec1 water quality ]
StormTac - Watershed-based Excel model for quantification of material transport by stormwater and design of stormwater treatment facilities.
Meta Description: [ StormTac is a watershed-based stormwater and recipient Excel model for pollutant transport, design of facilities and mass balance studies of receiving waters ]
The WRCS Hydrology and Hydraulics Software Shop - Describes and distributes a large collection of commercial, government-issue, and free water resources modeling programs and utilities, including US Army Corps of Engineers HEC programs.
Meta Description: [ The original hydrology software and hydraulic software site for the downloading and sale of commercial, government agency, and free hydrology software and hydraulics software and water resources engineering modeling programs and utilities. We feature all of the Corps of Engineers HEC programs, in... ]
USGS Water Resources Applications Software - Hydrologic and hydraulic modeling and analysis programs in geochemical, ground water, surface water, and water quality categories. Programs include PHREEQC, NETPATH, MODFLOW, MOC, SUTRA, FEQ, HSPF, GenScn, PeakFq, SWStat, and BLTM.
Meta Description: [ Home page for water resources
information from the US Geological Survey ]
WaterCom Engineering - Offers software and computational and consulting services for hydrology, hydraulics, and related applications. Offers a CD with a large collection of useful programs.
Meta Description: [ Water resources engineering services, including stormwater management, water supply and distribution design, stream and sewer hydraulics studies, software development and training, promotion of affordable hydrologic and hydraulic software and dissemination of water-related information. ]
WaterWare: Water Resources Management Information System - Decision support software from Environmental Software and Services GmbH.
WatPro Water Treatment Plant Simulator. - Software for tracking/calculating chlorine and disinfection byproducts in water treatment. Download free demo.
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