Key terms & definitions

An arrangement in which each object in one group is paired with exactly one object in another group.

Training provided throughout employment to maintain, improve and update employees’ skills.

A situation in which a person's identity is not known to others, for example when someone posts online without revealing their real name.

An online platform through which different businesses can sell their products to customers, such as Amazon or Etsy.

Media content accessed through the internet, including websites, social media and streaming services.

A UK law that places safety duties on online services, including duties to address illegal content and protect children from harmful content.

The use of a word whose sound resembles the sound it describes.

A word whose sound resembles the sound it describes.

The operations involved in running a printing press and transferring the image onto the material.

The Office for National Statistics, which publishes official statistics, including census results for England and Wales.

The beginning of a condition or its symptoms; this may occur before a formal diagnosis.

Training in which an employee learns while carrying out their actual job, usually with guidance from an experienced colleague.

The extent to which a material prevents light passing through it. An opaque sheet hides an image placed underneath.

A material that does not transmit light through it.

Not see-through; an opaque paint hides the timber grain beneath it.

Not transparent; cooked fish flesh becomes opaque rather than remaining translucent.

An object that does not transmit light.

The Organization of Petroleum Exporting Countries, whose members coordinate oil policies, including production targets.

The Organisation of Petroleum Exporting Countries: a group of oil-producing countries whose decisions can influence world oil supplies and prices.

An operation that makes a file available to a program for a chosen purpose, such as reading or writing.

Mining that removes surface material to expose and extract deposits beneath it, creating an open excavation.

A cellular plastic with interconnected spaces that allow air and liquids to pass through its structure.

A circle that shows an endpoint is excluded from a solution set.

An approach that broadly welcomed and encouraged immigration to the USA, before increasingly restrictive laws were introduced.

A class interval with no stated lower boundary or no stated upper boundary, such as $x \geq 90$.

A conclusion that leaves important questions unresolved rather than showing a definite outcome.

A farming arrangement in which large village fields were divided into strips cultivated by different households.

A grain structure with relatively large, visible pores, giving a coarse surface appearance.

The cash balance at the start of a period, equal to the previous period's closing balance.

A trial in which everyone involved knows which treatment each participant receives.