Digital tech cluster – A critical mass of digital technology businesses within an urban location, which interact formally (e.g. by trading or forming partnerships) and informally (e.g. networking, socialising).

Digital job ads – Online job advertisements for digital occupations (see methodology). (Source: Burning Glass)

Digital productivity – Nationally based on gva per worker, and locally based on turnover per worker. (Source: ONS Annual Business Survey/ONS Business Structures Database)

Digital Salary Growth – % change of average yearly salary in digital job ads between January- September 2012 and January-November 2016. (Source: Burning Glass)

Digital Tech Economy – Jobs in the digital tech industries plus digital jobs in non-tech industries (Source: ONS Annual Population Survey)

Digital tech employment/workforce – All digital and non-digital jobs in digital industries (see methodology). (Source: ONS Annual Population Survey)

Digital tech industries – Businesses operating in 4-digit Standard Industrial Classification (SIC) codes according to a classification developed by Nesta (see methodology). (Source: ONS Business Structures Database)

Digital tech business – Company that provides a digital technical service/product (including hardware and platforms) as its primary revenue source OR Provides a product/service that is reliant on digital technology as its primary revenue source.

Digital tech jobs – Jobs classified as ‘information economy occupations’ according to the Nesta definition. (Source: ONS Annual Population Survey)

GVA (Gross Value Added) – Average digital GVA between 2013-2015. GVA measures the contribution of each economic unit by estimating the value of an output (goods or services) less the value of inputs used in that output’s production process. (Source: ABS/BSD) .

High growth businesses – Proportion of digital tech businesses classified as high growth. Refers to businesses with 10 or more employees that are in the top 10% of all companies in terms of growth. (Source BSD, 2015).

Digital Density / Location quotient (LQ) – The higher a cluster’s LQ, the greater the concentration of digital tech businesses. A value of one equals average digital concentration, while a value of greater than one implies a higher concentration. (Source: BSD)

Local economy/regional economy – Regional economy refers to high level official geographies (government office regions in England, and Scotland, Wales and Northern Ireland). Local economy refers to a higher-resolution geography which, in Tech Nation 2017, is based on the ONS 2011 Travel to Work Areas.

Meetup – is an online social networking portal that facilitates offline group meetings in various localities around the world. Meetup group refers to the meetings that take place.

Non-digital industries – Those 4-digit SIC industries not classed as digital tech industries in Nesta the Nesta definition.

Digital Tech Investment – Finance available from private individuals or companies such as friends and family, angel investors, institutional venture capital funds or corporate venture capital funds.

Scale-up – Company that is growing exponentially, and normally has received a number of funding rounds to support its growth.

Standard Industrial Classification (SIC) industries/codes – A set of internationally agreed codes used to classify businesses into industries.

Startup – Company with a minimum viable product, working towards establishing a repeatable and scalable business model.

TTWA (Travel to Work Area) – A standardised unit of UK geography (see methodology). (Source: ONS)

Turnover – The amount of money taken by a business in a particular period. (Source: BSD)

Startup births – Average number of startup births 2011 - 2015

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