Glossary of Technical Terminology

Learn about common technical terms and definitions in our comprehensive glossary.

Developer Terminology:

Error 400:

A 400 error is a HTTP error where a web server is telling you that an application you are currently using e.g. Web Browser has accessed it incorrectly or the request was corrupted in some way.

Error 401:

A 401 error is a HTTP error where an unauthorized visitor is trying to access a restricted website due to a login error attempt.

Error 404:

A 404 error is a HTTP error where a particular file or web server cannot be accessed or found for example a mistyped URL or the website has been moved somewhere else with a new connection type.

Error 500:

A 500 error is a HTTP error where a web server encounters some form of internal error such as the web server being overloaded and therefore cannot handle requests properly.

Address Bar:

The white bar located at the top of your web browser where websites can be entered.


Bookmark is a function on any web browser that allows the user to save shortcuts to their desired website location.


A small piece of information that contains certain websites you have discovered/visited which can help the PC load the same website quicker for next time by retracting the information from your PC’s memory.

Database Driven:

Normal static websites save their information on its webpage and can be edited manually by the webmaster; a database driven website (like our Vacancy Lab software) saves all data on a database which has been manually set-up to locate and draw saved data from the website, onto the websites server.

Domain name & Registration:

A domain name is the website name and its address and the registration is a function that saves/reserves the websites name and address on the internet for a particular period of time (Usually two to three years).

Dynamic HTML:

Dynamic HTML refers to the language used to create a dynamic and interactive website instead of a static one.


DNS or "Domain Name System" is used to translate the address of a website (IP Address) to its hostname for example, can be translated to

Emoticon & Favicon:

Emoticon/Emoji is a 16x16 bit vector graphic that can be used in emails or text messages such as a smiley face. Favicon is the same as an emoticon, but is saved as your favorite and mostly used emoji.


HTTP or “Hyper Text Transfer Protocol” is a basic printed website with minimal security features.
HTTPS or “Hyper Text Transfer Protocol (Secure)” is the more secured version of any HTTP based website.


Hyperlink or also known as a URL, where a user will enter a website to visit in their browser.

Landing Page:

A landing page is the first main page of any website that the user will enter.


Meta data is where information is distributed from the header of a webpage to the visitor about the page.


Meta Tags provide information about a web page like the title and description of what the web page is about.


MySQL is a web database software designed for the use of PHP.


Navigation is where the user can navigate themselves around a webpage.


PHP is a programmable language that is mainly used on server side programs like our Vacancy Lab program.


A "plugin" is a third party piece of code that extends the capabilities of any website.


When search engines find websites on Google or Bing, they come up in a ranking order for more relevant information that has been entered by the user.

Search Engine:

Search Engine – A web-based platform like Google where a user can search for their desired website where depending on the information given by the user, can determine the outcome of a search.


SEO or “Search Engine Optimization” is the practice of tweaking and configuring website coding and its content to achieve the highest rank in the search engine.

Social Media:

Social Media is a broad term for any online tool that allows users to interact with each other via Chat or video calls such as Facebook and Twitter.


SQL is a “Structured Query Language” that allows developers and webmasters to create, edit and delete web databases.


URL/URI or commonly known as “Uniform Resource Locator” and “Uniform Resource Identifier” are both used to refer to the address of a web page.

The Technical Engineers Terminology:


Bcc or "Blind Carbon Copy" is used in emails to send some an email and their address won’t be shown in the “to” field.


CC or "Carbon Copy" allows a user to add another email address to be receive a copy of an email being sent to a desired recipient.


Bounce is when an email fails to send to a recipient and bounces back into your mailbox.


Cache is the temporary memory that both the Web browser and PC hardware use simultaneously to save already visited websites to make it easier for the user to go back to the previous location.


Catchall are used in email addresses and mail servers, where the “Catchall” function catches any emails sent to your domain that are governed by a set of rules to either block/remove or redirect emails to another location.

Cloud Computing:

Cloud Computing – Is a term describing particular software that is online rather than being local on a PC. Such as Web-Based email where the user’s email is all stored and accessed in the cloud of the internet.


CSV or “Comma Separated Value” is a type of primary based file that most production/editing software will save information in a “storing tabular data” format, making it easier and more compatible for other system software to access this data.


Emails is an electronic service used for businesses and or standalone users to send information to other people.

Email Client:

Email Client is another term for recipient that is used to send direct emails to.


The "Firewall" is a Built in security system that is always guaranteed with most Operating systems which allows and disallows certain traffic of data to enter the system/network infrastructure.

FTP & FTP Client:

FTP or "File Transfer Protocol" is a network protocol that allows data to be uploaded to websites with the necessary permissions.
FTP Client is where the data will be uploaded and stored onto such as a website.


Host/Hosting is a host or hosting service which allows users to host their websites with their particular bespoke email addresses.


IMAP or “Internet Message Access Protocol” is a standard way to get email but also saves data via a cloud computer used by a certain email provider such as Gmail.

IP Address:

IP Address or “Internet Protocol” address is a set of numbers and or letters combined which refers to what the Node is and where it is. Two examples of this would be either a website or another computer connected to the same network as you are.

Mail Server:

A mail server is a computer/server that distributes email services.

PDF (Portable Document Format):

PDF or “Portable Document Format” is a commonly used document that stores the information in such a way that it makes it compatible to be stored and uploaded onto the web.


POP or “Post Office Protocol” is another standard way to retrieve emails by storing all information on the local system.


A query is a question or request in regards to fixing/patching a system problem.


QWERTY is an acronym of a standard keyboard where “qwerty” is shown at the top of the keyboard.


A server is a computer that is used to host websites and provide physical storage for emails, websites and a permanent connection to the internet.


Server-Side refers to scripts running on a web server as opposed to a user’s browser.


The "Sitemap" is an index to all content on a particular website and its pages to help visitors find what they are looking for on the website and to allow search engines find all the links necessary.


Subdomain – This is known as an under layer of a domain. So where a domain belongs to a larger domain, they would have separate domains to connect to one. For example, and are subdomains of

Top Level Domain:

A "Top Level Domain" is the domain name extension for websites such as .com or .gov

Vector Graphics:

Vector Graphics or “Object Orientated Graphics” are images stored in a form of mathematical representations that can be resized and scaled without distortion.


VoIP or “Voice over Internet Protocol” is a technology used mainly in office phones that uses Internet Protocol (IP) instead of voice recognition as a primary for voice conversation by telephone.


The "Webmail" is an email system that you can access from any internet connected computer that uses the appropriate software on a server

ZIP File:

ZIP files are a windows and Linux based compressed file which is used mainly for data compression in the deliverance of data.

IT Security Terminology:


A Bot (Shortened for robot), is an automated program that can execute commands, reply to messages and or perform routine tasks with minimal human interaction.

Cyber Essentials:

Cyber Essentials is a Government-backed scheme that helps protect your organisation against a whole range of the most common cyber attacks. More details about Cyber Essentials Certification.


Phishing is A fraudulent way for hackers and scammers to send emails to reputable companies in order to gather information or currency such as passwords or credit card information.

SSL Certificate:

SSL or “Secure Socket Layer” is the standard technology used for securing connections to websites to its visitors which is mainly distributed as a certificate. Learn more about why an SSL Certificate is right for your business.


VPN or “Virtual Private Network” is a secure private network that uses public telecommunications infrastructure to transmit data.

Jarrett & Lam
+44 (0) 1293 127 128