Open Source Definition
1) In general, open source refers to any program whose source code is made available for use or modification as users or other developers see fit. Open source software is usually developed as a public collaboration and made freely available.
2) Open Source is a certification mark owned by the Open Source Initiative (OSI). Developers of software that is intended to be freely shared and possibly improved and redistributed by others can use the Open Source trademark if th...
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Freeware Definition
Freeware Definition
Freeware (not to be confused with free software) is programming that is offered at no cost and is a common class of small applications available for downloading and use in most operating systems. Because it may be copyrighted, you may or may not be able to reuse it in programming you are developing. The least restrictive "no-cost" programs are uncopyrighted programs that are in the public domain. When reusing public domain software in your own programs, it's good to know the...
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Shareware Definition
Shareware Definition
Shareware is software that is distributed free on a trial basis with the understanding that the user may need or want to pay for it later. Some software developers offer a shareware version of their program with a built-in expiration date (after 30 days, the user can no longer get access to the program). Other shareware (sometimes called liteware) is offered with certain capabilities disabled as an enticement to buy the complete version of the program.
Shareware is som...
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Applet Definition
Applet Definition
An applet (little application) is a small software program that supports a larger application program. In the past, the term applet was often associated with the Java programming language. Today, the term is often associated with If This Then That (IFTTT), a no-code/low-code software tool for creating small programs composed of triggers (If This) and actions (Then That).
History of Java applets
Sun Microsystems introduced Java applets in 1995. Unlike other applications, ...
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Middleware Definition
Middleware Definition
Middleware is the software that connects network-based requests generated by a client to the back-end data the client is requesting. It is a general term for software that serves to "glue together" separate, often complex and already existing programs.
Middleware programs come in on-premises software and cloud services, and they can be used independently or together, depending upon the use case. While cloud providers bundle middleware into cloud services suites,...
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Operating System (OS) Definition
Operating System (OS) Definition
An operating system (OS) is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer. The other programs are called applications or application programs. The application programs make use of the operating system by making requests for services through a defined application program interface (API). In addition, users can interact directly with the operating system through a user interface suc...
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Storage Distributed Resource Scheduler (DRS)
Storage Distributed Resource Scheduler (DRS)
VMware DRS (Distributed Resource Scheduler) is a load balancing utility that assigns and moves computing workloads to available hardware resources in a virtualized environment.
DRS can be configured to recommend workload balancing or to automatically move workloads. VMware DRS users can refine resource allocation with affinity rules and anti-affinity rules. The utility allows VMware administrators to prioritize resources according ...
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Thick Provisioning Definition
Thick Provisioning Definition
In virtual storage, thick provisioning is a type of storage allocation in which the amount of storage capacity on a disk is pre-allocated on physical storage at the time the disk is created.
This means that creating a 100GB virtual disk actually consumes 100GB of physical disk space, which also means that the physical storage is unavailable for anything else, even if no data has been written to the disk.
Thick provisioning contrasts with thin provisio...
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Domain Defintion
Domain Defintion
Also see domain name.
In general, a domain is an area of control or a sphere of knowledge.
1) In computing and telecommunication in general, a domain is a sphere of knowledge identified by a name. Typically, the knowledge is a collection of facts about some program entities or a number of network points or addresses.
2) On the Internet, a domain consists of a set of network addresses. This domain is organized in levels. The top level identifies geographic or pu...
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Host Defintion
Host DefintionA host (also known as "network host") is a computer or other device that communicates with other hosts on a network. Hosts on a network include clients and servers -- that send or receive data, services or applications.Hosts typically do not include intermediary network devices like switches and routers, which are instead often categorized as nodes. A node is also a broader term that includes anything connected to a network, while a host requires an IP address. In other words, all...
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