What is web application?

Web application is a collection of scripts The definition from the article "Penetration Testing for Web Applications (Part One)" (Jody Melbourne and David Jorm via Symantec). "A Web application is an application, generally comprised of a collection of scripts, that reside on a Web server and interact with databases or other sources of dynamic content.
Oct 30, 2017

Web application is a collection of scripts

The definition from the article "Penetration Testing for Web Applications (Part One)" (Jody Melbourne and David Jorm via Symantec).

"A Web application is an application, generally comprised of a collection of scripts, that reside on a Web server and interact with databases or other sources of dynamic content.

They are fast becoming ubiquitous as they allow service providers and their clients to share and manipulate information in an (often) platform-independent manner via the infrastructure of the Internet.

Some examples of Web applications include search engines, Webmail, shopping carts and portal systems.

Web applications typically interact with the user via FORM elements and GET or POST variables (even a 'Click Here' button is usually a FORM submission).

With GET variables, the inputs to the application can be seen within the URL itself, however, with POST requests it is often necessary to study the source of form-input pages (or capture and decode valid requests) in order to determine the users inputs".

What is web application?
An example HTTP request that might be provided to a typical Web application. Every element of this request can potentially be used by the Web application processing the request. The REQUEST-URI identifies the unit of code that will be invoked along with the query string: a separated list of &variable=value pairs defining input parameters. This is the main form of Web applications input. The Session-ID header provides a token identifying the client's established session as a primitive form of authentication. The Host header is used to distinguish between virtual hosts sharing the same IP address and will typically be parsed by the Web server, but is, in theory, within the domain of the Web application.

Web application is a software application

The definition below is from the article "Web Application Scanners: Definitions and Functions" (Proceedings of Hawaii International Conference on System Sciences).

"The Web Application Security Consortium (WASC) defines a web application as “a software application, executed by a web server, which responds to dynamic web page requests over HTTP.”

A web application is comprised of a collection of scripts, which reside on a web server and interact with databases or other sources of dynamic content.

Using the infrastructure of the Internet, web applications allow service providers and clients to share and manipulate information in a platform-independent manner.

The technologies used to build web applications include PHP, Active Server Pages (ASP), Perl, Common Gateway Interface (CGI), Java Server Pages (JSP), JavaScript, VBScript, etc.

Some of the broad categories of web application technologies are communication protocols, formats, server-side and client-side scripting languages, browser plug-ins, and web server API.

A web application has a distributed n-tiered architecture. Typically, there is a client (web browser), a web server, an application server (or several application servers), and a persistence (database) server".

What is web application?
A simplified view of a web application There may be a firewall between web client and web server. Source: samate.nist.gov/docs/wa_paper.pdf

Web application is a program

The definition below is from the article "Java Technologies for Web Applications" (Oracle Technology Network).

"Web applications are programs that run on more than one computer and communicate through a network or server.

Specifically, web applications are accessed with a web browser and are popular because of the ease of using the browser as a user client.

For the enterprise, the ability to update and maintain web applications without deploying and installing software on potentially thousands of client computers is a key reason for their popularity. Web applications are used for webmail, online retail sales, discussion boards, weblogs, online banking, and more. One web application can be accessed and used by millions of people.

Web applications are made up of many parts and often contain mini-programs, some of which have user interfaces, and some of which do not require a graphical user interface (GUI) at all.

In addition, web applications frequently require an additional markup or scripting language, such as HTML, CSS, or JavaScript programming language. 

A web application can be as simple as a page that shows the current date and time or as complex as a set of pages on which you can look up and book the most convenient flight, hotels, and car rentals for your next vacation".

Blog writers

Subscribe to Belitsoft's Blog for Entrepreneurs

Join successful software startup founders! Get insights from growing companies like, where to get an idea, how to validate it, how to launch, and how to hire people - everything. Enter your email address below (no spam):

Email *


Lead Generation Design of The Best SaaS Websites

If clothes make the man, the design makes the website. That's where potential customers start evaluating a product. The SaaS website can (and should) be an online lead-generation machine, so each component of it has to be as good as possible. As people generally remember the first and the last thing they see, having impressive header and footer can go a long way towards making your product successful. What do some of the best SaaS companies do with their websites’ headers/footers? Look at this list to get and keep in mind some ideas for custom software development while building or redesigning your SaaS website. ...

PHP 7 vs Node.js

Our team is experienced both in PHP programming and Node.js development. We have a portfolio with both PHP-based applications and Node.js-based applications as well as mixed ones. What do we take into account when considering which tool to use in custom software development? ...

The Top 10 Advantages Of Laravel for Cost-Effective Web Development

Laravel framework is very popular for custom software development. It is the Most Starred PHP Framework on Github: more than 35 000 developers from all over the world (mostly from the USA) greatly appreciate robust features of this platform. Based on data of the BuiltWith, Laravel's popular websites verticals include Business, Entertainment, Media, News, Shopping, Technology, Vehicles. Why is Laravel so popular? ...

100% Remote Million-Dollar SaaS Companies

Companies that hire remote (distributed, virtual, dispersed, or dedicated) workers and do it well seem to have a huge leg up on the competition. Let’s learn how these successful SaaS companies use global talents to increase software quality and reduce the cost of rent and office supplies: Basecamp, Buffer, Chargify, Convertkit, Ghost(pro), Groove, Hubstaff, Invision, Olark, and Zapier. As the company where you can find a remote PHP developer, we believe that you could utilize their experience and expertise to build your own full remote SaaS company. ...

SaaS Founders Who Became Rich Starting With MVP

Belitsoft has a huge experience in MVP software development for startups and prototypes for existing brands. MVP is a minimal version of the product with the minimum set of features that is enough to deploy and test the key hypothesis to solve problems of this product’ potential customers. Experts suggest that, in B2B, it’s not an MVP until you sell it. Viable means you can sell it. ...

Profitable SaaS Startup Ideas

The way to get profitable startup idea is not to try to think of startup ideas (including SaaS development). It's to look for problems, preferably problems you have yourself.  In fact, for many entrepreneurs, successful business ideas start out as solutions designed to address a challenge they face personally. Solving the problem that frustrates you may be one of the best ways of finding an idea for your startup. Look at these software developers who turned their problem into success.  ...

Get A Free Quote

Do you have a software development project to implement? We have people to work on it.
We will be glad to answer all your questions as well as estimate any project of yours.
Use the form below to describe the project and we will get in touch with you within 1 business day.

Call us:
Phone - USA
Contact form