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Glossary

The language of change, in plain English.

Short, jargon-free definitions of the terms that come up in AI, blockchain, technology, data and transformation work. Written for boards, buyers and anyone who wants to follow the conversation.

#Agentic workflowAI
A process in which AI agents complete several steps in sequence, such as receiving a request, checking it, deciding and reporting, rather than answering a single question.
#AI agentAI
Software that uses an AI model to carry out a task on its own within set limits: reading a document, checking a rule, drafting a reply or updating a system, then handing over to a person where needed.
#AI brainAI
An orchestration layer that coordinates several AI agents, routes work between them, applies your policies and keeps a record of every decision.
#AI governanceAI
The policies, controls and records that make AI use safe, lawful and accountable: who may do what, which actions need a person, and how decisions are logged and reviewed.
#APITechnology
An agreed way for two systems to exchange information automatically. APIs replace re-keying and spreadsheets passed between teams.
#BaselineBusiness
The measured starting point of a process or result before change begins. Without a baseline, improvement cannot be proven.
#BlockchainBlockchain
A shared record that several parties keep identical copies of. New entries are grouped into blocks and linked, so past entries cannot be quietly changed.
#Consensus mechanismBlockchain
The rules that let the computers running a blockchain agree on which new entries are valid, without a central authority.
#Corporation TaxTax
The UK tax on company profits, paid nine months and one day after the end of the accounting period and reported on a CT600 return.
#Cycle timeBusiness
The time from the start of a piece of work to its finish, including waiting. It is often the clearest measure of process friction.
#Data lineageData
A record of where a piece of data came from and every step that changed it, so a figure in a report can be traced back to its source.
#Data warehouseData
A central store where data from many systems is cleaned and organised for reporting and analysis.
#DiagnosticBusiness
A short, fixed-scope engagement that defines the problem, sets the baseline and recommends what to do next, before larger commitments are made.
#Distributed ledgerBlockchain
Any database that is copied and kept in agreement across several organisations or computers, with no single owner able to rewrite it. A blockchain is one kind.
#Double taxation reliefTax
Treaty rules and foreign tax credits that stop the same income being taxed in full by two countries, such as the UK and the US.
#Estimated taxTax
Quarterly US tax payments made by people and businesses whose income is not covered by withholding, to avoid underpayment penalties.
#FBARTax
The US report of foreign bank and financial accounts, required when their combined value exceeds a set amount at any point in the year.
#ForecastingData
Using past data and known drivers to estimate future values, such as demand, cash or staffing, with a stated range of uncertainty.
#Form 1040Tax
The main US federal income tax return for individuals, including the self-employed, who attach schedules such as Schedule C for business income.
#HallucinationAI
When an AI model produces an answer that sounds confident but is wrong or invented. Good design, grounding in your data and testing reduce it.
#Human in the loopAI
A checkpoint where a person must review or approve an automated action before it takes effect, typically for high-value or high-risk decisions.
#Infrastructure as codeTechnology
Defining servers, networks and cloud services in version-controlled files, so environments can be rebuilt, reviewed and audited like software.
#Integration layerTechnology
A deliberate set of connections and rules that lets all of an organisation's systems share data reliably, instead of many one-off links.
#Large language modelAI
An AI model trained on large amounts of text that can read, summarise and write language. It is the engine inside most modern AI assistants and agents.
#Licence rationalisationBusiness
Reviewing every software subscription to remove overlap, consolidate vendors and renegotiate terms, so fewer tools do more.
#Lift and shiftTechnology
Moving a system to the cloud largely unchanged. It is fast, but usually misses the cost and resilience benefits of redesigning for the cloud.
#Making Tax DigitalTax
The UK requirement to keep digital records and send updates to HMRC through compatible software, now in place for VAT and phased in for income tax from April 2026.
#Milestone vestingBusiness
An arrangement where an equity or token stake is earned in stages as agreed delivery milestones are reached, rather than all at once.
#Model evaluationAI
Testing an AI system against a fixed set of real examples with known correct answers, so quality can be measured before launch and after every change.
#OracleBlockchain
A trusted service that brings outside information, such as a price, a delivery scan or a sensor reading, onto a blockchain so smart contracts can act on it.
#Payback periodBusiness
How long it takes for the savings or revenue from an investment to repay its cost.
#PAYETax
Pay As You Earn: the UK system employers use to deduct income tax and National Insurance from wages and report them to HMRC every pay day.
#Permissioned blockchainBlockchain
A blockchain where only approved organisations can take part or validate entries. It suits businesses that need privacy and known participants.
#Process miningData
Reconstructing how work actually flows from the timestamps systems already record, revealing delays, loops and workarounds.
#Prompt injectionAI
An attack in which hidden instructions in a document, email or web page try to make an AI system ignore its rules. Scoped permissions and input checks defend against it.
#Retained advisoryBusiness
An ongoing monthly arrangement in which the same team keeps measuring, improving and supporting what was delivered after go-live.
#Retrieval-augmented generationAI
A technique where an AI model first looks up relevant passages in your own trusted documents and then answers using them, which makes answers more accurate and traceable.
#Return on investmentBusiness
The benefit of an investment compared with its cost, usually shown as a percentage or a multiple over a stated period.
#RTO and RPOTechnology
Recovery time objective is how quickly a service must be back after a failure. Recovery point objective is how much recent data you can afford to lose.
#S corporationTax
A US company that elects to pass its profits and losses through to its owners, who report them on their personal returns instead of the company paying corporate tax.
#Sales tax nexusTax
The connection with a US state, through sales volume or physical presence, that obliges a business to register for and collect that state’s sales tax.
#Self AssessmentTax
The UK system for reporting income that is not fully taxed at source, such as self-employment, rental or investment income, through an annual tax return.
#Smart contractBlockchain
A small program stored on a blockchain that runs automatically when agreed conditions are met, for example releasing a payment once delivery is confirmed.
#Smart contract auditBlockchain
An independent review of smart contract code to find security flaws and logic errors before it goes live, when mistakes are costly or impossible to reverse.
#StablecoinBlockchain
A token designed to hold a steady value, usually by being backed by a currency such as the pound or the dollar.
#Technical debtTechnology
The future cost of shortcuts taken in systems today. Like financial debt, it accumulates interest in the form of slower change and higher risk.
#TokenBlockchain
A digital unit recorded on a blockchain. It can represent value, access, ownership or voting rights, depending on how it is designed.
#TokenisationBlockchain
Representing a right to an asset, such as a share of a property, a carbon credit or an invoice, as a digital token that can be held, transferred and audited on a ledger.
#Total cost of ownershipBusiness
The full cost of a system over its life: licences, implementation, integration, support, training and eventual replacement, not just the purchase price.
#VATTax
Value Added Tax, charged on most goods and services sold in the UK. Businesses must register once taxable turnover passes the registration threshold.
#Wallet and custodyBlockchain
A wallet holds the keys that control digital assets. Custody is how those keys are stored and protected, by you or by a regulated provider.
#Zero-trust securityTechnology
A security model that never assumes a user or device is safe because it is inside the network. Every request is verified, and access is kept to the minimum needed.
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