ActionScript was initially designed for controlling simple 2D vector animations made in Adobe Flash (formerly Macromedia Flash). Initially focused on animation, early versions of Flash content offered few interactivity features and thus had very limited scripting capability. Later versions added functionality allowing for the creation of Web-based games and rich Internet applications with streaming media (such as video and audio).

Ajax (shorthand for Asynchronous JavaScript and XML) is a group of interrelated web development methods used on the client-side to create interactive web applications. With Ajax, web applications can retrieve data from the server asynchronously in the background without interfering with the display and behavior of the existing page. Data is usually retrieved using the XMLHttpRequest object.

Ajax is not one technology, but a group of technologies. Ajax uses a combination of HTML and CSS to mark up and style information. The DOM is accessed with JavaScript to dynamically display, and to allow the user to interact with the information presented. JavaScript and the XMLHttpRequest object provide a method for exchanging data asynchronously between browser and server to avoid full page reloads.

A web browser or Internet browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web. An information resource is identified by a Uniform Resource Identifier (URI) and may be a web page, image, video, or other piece of content. Hyperlinks present in resources enable users to easily navigate their browsers to related resources.

Although browsers are primarily intended to access the World Wide Web, they can also be used to access information provided by Web servers in private networks or files in file systems. Some browsers can also be used to save information resources to file systems.

A web content management system (CMS) is a software system which provides website authoring, collaboration and administration tools designed to allow users with little knowledge of web programming languages or markup languages to create and manage the site's content with relative ease. Most systems use a database to store content, metadata, or artifacts that might be needed by the system.

Administration is typically done through browser-based interfaces, but some systems require the use of a fat client.

Unlike Web-site builders, a CMS allows non-technical users to make changes to a website with little training. A CMS typically requires an experienced coder to set up and add features, but is primarily a Web-site maintenance tool for non-technical administrators.

Cascading Style Sheets (CSS) is a style sheet language used to describe the presentation semantics (the look and formatting) of a document written in a markup language. Its most common application is to style web pages written in HTML and XHTML, but the language can also be applied to any kind of XML document, including SVG and XUL.

The current most used and supported version is 2.0, published in 1998.

Cascading Style Sheets (CSS) is a style sheet language used to describe the presentation semantics (the look and formatting) of a document written in a markup language. Its most common application is to style web pages written in HTML and XHTML, but the language can also be applied to any kind of XML document, including SVG and XUL.

Version 3 is the future version of CSS implementation, under work since 2005 and currently at least partially supported by most browsers. Version 3 adds a lot more formatting and graphical tweaks.

b>Domain names are used in various networking contexts and application-specific naming and addressing purposes. They are organized in subordinate levels (subdomains) of the DNS root domain, which is nameless. The first-level set of domain names are the top-level domains (TLDs), including the generic top-level domains (gTLDs), such as the prominent domains .com, .net and .org, and the country code top-level domains (ccTLDs). Below these top-level domains in the DNS hierarchy are the second-level and third-level domain names that are typically open for reservation by end-users that wish to connect local area networks to the Internet, run web sites, or create other publicly accessible Internet resources. The registration of these domain names is usually administered by domain name registrars who sell their services to the public.

Individual Internet host computers use domain names as host identifiers, or hostnames. Hostnames are the leaf labels in the domain name system usually without further subordinate domain name space. Hostnames appear as a component in Uniform Resource Locators (URLs) for Internet resources such as web sites (e.g., www.google.com).

Adobe Flash (formerly Macromedia Flash) is a multimedia platform used to add animation, video, and interactivity to web pages. Flash is frequently used for advertisements and games.

Flash manipulates vector and raster graphics to provide animation of text, drawings, and still images. It supports bidirectional streaming of audio and video.

Flash content may be displayed on various computer systems and devices, using Adobe Flash Player, which is available free of charge for common web browsers, some mobile phones and a few other electronic devices (using Flash Lite).

An Internet hosting service is a service that runs Internet servers, allowing organizations and individuals to serve content to the Internet. There are various levels of service and various kinds of services offered.

A common kind of hosting is web hosting. Most hosting providers offer a combined variety of services. Web hosting services also offer e-mail hosting service, for example. DNS hosting service is usually bundled with domain name registration.

The Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless and optical networking technologies. The Internet carries a vast range of information resources and services, such as the inter-linked hypertext documents of the World Wide Web (WWW) and the infrastructure to support electronic mail.

Java refers to a number of computer software products and specifications from Sun Microsystems, a subsidiary of Oracle Corporation, that together provide a system for developing application software and deploying it in a cross-platform environment. Java is used in a wide variety of computing platforms from embedded devices and mobile phones on the low end, to enterprise servers and supercomputers on the high end. Java is used in mobile phones, Web servers and enterprise applications, and while less common on desktop computers, Java applets are sometimes used to provide improved and secure functionalities while browsing the World Wide Web.

JavaScript este un limbaj de programare orientat obiect, utilizat in construirea siturilor web pentru diverse activitati cum ar fi verificarea datelor introduse de utilizatori sau crearea de meniuri si alte efecte animate.

Viteza de transfer de date, sau mai simplu, viteza de transfer, uneori numita si latimea benzii (de transmisie), este raportul dintre cantitatea de date transmise si timpul de transmisie.

O hiperlegatura (hiperlink sau simplu link) este un obiect care iti permite sa deschizi un fisier, un folder sau o pagina web aflata pe calculatorul propriu, pe Internet sau in Intranet. Cand dai clic pe o hiperlegatura, browser-ul de Internet deschide fisierul la care face referire hiperlegatura.

Un motor de cautare este un program care acceseaza Internetul in mod automat si frecvent si care stocheaza titlul, cuvinte cheie si partial chiar continutul paginilor web intr-o baza de date.

In momentul in care un utilizator apeleaza la un motor de cautare pentru a gasi o anumita fraza sau cuvant, motorul de cautare se va uita in aceasta baza de date si in functie de anumite criterii de prioritate va crea si afisa o lista de rezultate.

Un sit web este alcatuit de regula din mai multe pagini web. O pagina web este un document creat cu ajutorul limbajului de marcare HTML si (optional) limbaje de programare cum ar fi PHP, ASP si altele, fiind accesibil vizitatorilor prin intermediul protocolului HTTP, care transfera informatia de la server la browser. Pagina web se numeste asa deoarece, afisata pe un monitor, ea se aseamana cu o pagina de ziar.

PHP este un limbaj de programare, folosit initial pentru a produce pagini web dinamice, iar acum este folosit pe scara larga in dezvoltarea paginilor si aplicatiilor web.

Este unul din cele mai importante limbaje de programare web open-source si server-side. Conform statisticilor este instalat pe 20 de milioane de situri web si pe 1 milion de servere web.

Un server este o aplicatie pe computer, uneori chiar un computer intreg, care opereaza continuu in reteaua sa si asteapta solicitari din partea altor calculatoare din retea.

Aproape toata structura Internetului se bazeaza pe modelul de client-server. Multe milioane de servere din toata lumea sunt conectate la Internet si ruleaza continuu.

Majoritatea serviciilor oferite pe Internet ruleaza pe servere: Web, Domain Name System(DNS), electronic mail sau posta electronica, file transfer sau transfer de fisiere, instant messaging sau mesagerie instanta, fisiere audio si video; jocuri s.a.m.d. Pentru orice actiune care este initiata de un utilizator al Internetului, unul sau mai multe servere interactioneaza unul cu celalalt.

Search Engine Optimization (SEO, in romana: optimizare pentru motoare de cautare) este o subcategorie a marketing-ului online, practica aparuta in anul 1990, odata cu aparitia primelor site-uri pe Internet, si care reprezinta totalitatea tehnicilor prin care un site web este adus la o forma in care este propulsat mai sus in lista de rezultate date de un motor de cautare pentru diverse cuvinte-cheie.

Cu timpul, optimizarea unei pagini web a unui site a devenit un serviciu oferit de unele companii si/sau corporatii.

Notiunea sit web provine din expresia engleza web site si desemneaza o grupa de pagini web multimedia (continand texte, imagini fixe, animatii s.a.), accesibile in Internet in principiu orisicui, de obicei pe o tema anume, si care sunt conectate intre ele prin asa-numite hiperlinkuri.

Diversele situri web pot fi create de catre o organizatie, o persoana particulara, institutii publice etc. Notiunea apare in limba romana scrisa sub trei forme (fara a exista o pozitie oficiala care sa o favorizeze pe vreuna dintre ele): sit, site (ca in limba engleza) si sait.

SQL este un limbaj de programare specific lucrului cu bazele de date, devenit un standard in domeniu, fiind cel mai popular limbaj utilizat pentru creearea, modificarea, regasirea si manipularea datelor de catre Sistemele de Gestiune a Bazelor de Date relationale.

Desi este folosit foarte des impreuna cu limbajul de programare PHP, cu MySQL se pot construi aplicatii in orice limbaj major.

Unitatea de masura in Sistemul international de unitati SI pentru viteza de transfer este 1 bit pe secunda (1 bps). Cei mai des utilizati multipli ai unitatii bps sunt:

Kbps (kilobit pe secunda) = 10³ bps

Mbps (megabit pe secunda) = 10⁶ bps

Gbps (gigabit pe secunda) = 10⁹ bps

Prin web design sau webdesign se intelege in general realizarea de situri web, de la momentul conceperii structurii si interfetei grafice si pana la finalizarea programarii si introducerea propriu-zisa a datelor - imagini, text, fisiere si alte elemente - care alcatuiesc continutul sitului.

Termenul World Wide Web (abreviat WWW; numit scurt si web care in engleza inseamna "retea") este un sistem de documente si informatii de tip hipertext legate ele intre ele care pot fi accesate prin reteaua mondiala de Internet. Documentele, care rezideaza in diferite locatii pe diverse calculatoare-server, pot fi regasite cu ajutorul unui URL univoc.

Hipertextul este prelucrat cu un ajutorul unui program de navigare in web numit browser care descarca paginile web de pe un server web si le afiseaza pe un terminal.

HTML este un limbaj de marcare utilizat pentru crearea paginilor web ce pot fi afisate intr-un browser (sau navigator). Scopul HTML este mai degraba prezentarea informatiilor in paragrafe, fonturi, liste sau tabele decat descrierea semanticii documentului.

eXtensible Markup Language (XML) este un meta-limbaj de marcare pentru crearea de alte limbaje de marcare, cum ar fi XHTML, RDF, RSS, MathML, SVG, OWL etc. Aceste limbaje formeaza familia de limbaje XML.

Meta-limbajul XML este o simplificare a limbajului SGML (din care se trage si HTML) si a fost proiectat in scopul transferului de date intre aplicatii pe internet, descriere structura date. XML este acum si un model de stocare a datelor nestructurate si semi-structurate in cadrul bazelor de date native XML.