Jargon Buster A–Z
O terms
16 glossary terms starting with O.
Letter overview
What is inside this section
Internet Basics
2 terms
Devices & Hardware
3 terms
Apps & Software
3 terms
Security & Privacy
2 terms
Communication
3 terms
Payments & Shopping
3 terms
-
Offline Mode
Apps & SoftwareThe ability to use an app or access content without an internet connection.
Like reading a book you borrowed from the library — you have it with you even when not connected.
-
Offline Page
Internet BasicsA page stored on your device that loads when you have no internet connection.
Like a map you downloaded before a trip — it works even when there is no signal.
-
OLED Display
Devices & HardwareA screen technology where each pixel produces its own light, giving deeper blacks and more vibrant colours.
Like a painting where each brushstroke glows on its own.
-
Onboarding
Apps & SoftwareThe process of guiding a new user through an app's features for the first time.
Like the welcome tour given to a new employee on their first day.
-
Online Account
Security & PrivacyYour personal space on a website or app.
Like your own locker at school.
-
Online Forum
CommunicationA website where people post questions and answers on a topic, and others can reply in a thread.
Like a community notice board where anyone can post a question and others pin their answers.
-
Online Meeting
CommunicationA meeting conducted using the internet.
Like gathering in a virtual conference room.
-
Online Payment
Payments & ShoppingPaying for something using the internet.
Like sending money electronically.
-
Open Banking
Payments & ShoppingA system allowing third-party apps to access your bank data with your permission, enabling personalised financial services.
Like giving a financial advisor read-only access to your accounts so they can give better advice.
-
Open Source
Apps & SoftwareSoftware whose code is freely available for anyone to view, use, modify, and distribute.
Like a recipe that anyone can read, cook, and improve upon.
-
Operating System
Devices & HardwareThe main software that runs your device.
Like the manager of a busy office.
-
Order Tracking
Payments & ShoppingFollowing the progress of an online purchase from dispatch to delivery.
Like watching a parcel's journey on a map from the warehouse to your door.
-
Organic Search Result
Internet BasicsA search engine result that appears because it is genuinely relevant, not because someone paid for it.
Like a restaurant recommended because it is genuinely good, not because it paid for an advertisement.
-
OTP (One-Time Password)
Security & PrivacyA temporary code sent to your phone or email that can only be used once for a single login or transaction.
Like a single-use entry ticket — it lets you in once and then it expires.
-
Out-of-Office Reply
CommunicationAn automatic email response sent to people who contact you while you are away, letting them know you are unavailable.
Like putting a note on your door saying when you will be back.
-
Overheating
Devices & HardwareWhen a device gets too hot due to heavy use or poor ventilation, causing it to slow down or shut off for safety.
Like a car engine warning light — the system protects itself by reducing speed when too hot.