physics

Police National Computer

Police National Computer is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Police National Computer rather than just read about it. In short: The Police National Computer (PNC) is a crime information center and database used by members of the United Kingdom law enforcement and other non-law enforcement agencies, maintained by the Criminal Records Office (ACRO) under the governance of the National Police Chiefs' Council. Originally developed in the early 1970s, PNC1 went "live" in 1974, providing UK police forces with online access to the lost/stolen vehic…

Police National Computer — illustration

Key takeaways

Police National Computer belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Police National Computer to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Police National Computer from memory before moving on to harder problems.

Reference excerpt

The Police National Computer (PNC) is a crime information center and database used by members of the United Kingdom law enforcement and other non-law enforcement agencies, maintained by the Criminal Records Office (ACRO) under the governance of the National Police Chiefs' Council. Originally developed in the early 1970s, PNC1 went "live" in 1974, providing UK police forces with online access to the lost/stolen vehicle database. The vehicle owners application quickly followed, giving the police online access to the names/addresses of every vehicle owner in the UK. The PNC started holding nominal information based on the computerisation of criminal records held by the Metropolitan Police and other police forces in the late 1970s. These records could be accessed online in real-time by all UK police forces via the "Names" applications. It now consists of several databases available 24 hours a day, giving access to information of national and local matters. As of 18 January 2021, Kit Malthouse said that there are 13 million person records, 58.5 million driver records, and 62.6 million vehicle records stored on the PNC. The PNC is currently the responsibility of the Home Office. Between 2007 and 2012, it was maintained by the National Policing Improvement Agency (NPIA) which inherited the activities of the now disbanded Police Information Technology Organisation (PITO). It is to be decommissioned upon the expiry of its current support contract in March 2026, being replaced by the Law Enforcement Data Service (LEDS) system.

History In 1969, the National Police Computer was set to be launched in 1972. Another government computer system was the GPO National Data Processing System, set up in 1969. Since its inception in 1974, the PNC has undergone numerous changes that were gradually introduced. The most notable was the introduction of the Phoenix (Police and Home Office Enhanced Names Index) in 1995. This format has been retained to the present day. The PNC is based on a Fujitsu BS2000/OSD SE700 mainframe and developed in ADABAS, with recent PNC applications held on UNIX servers. There are around 26,000 directly connected terminals and 25,000 terminals that are connected via local police force computer systems. The mainframe is connected to the end user in several ways: for high volume users (i.e., other police forces) via secure IP network; for low volume users, a secure dial-up link is provided by Cable & Wireless. Another connection method is via an X.25 packet-switched network; this method is being phased out. Databases for vehicles and driving licences are copied from the DVLA databases in the early morning; there is no service loss when an update is in progress. The mainframe server is located at the Hendon Data Centre with back-up servers located around the UK. In 2005, the only back-up server was located next to Hertfordshire Oil Storage Terminal in Buncefield, which was the scene of a major civil emergency when it burned to the ground in December 2005. According to the Home Office, the location had been assessed as low-risk notwithstanding that the site was 100 yards (91 m) from a disaster hazard.

Users

Requests for access to PNC are decided upon by the PNC Information Access Panel (PIAP). The members of the panel are the National Police Chiefs' Council (NPCC), the Association of Police Authorities, and the Home Office. Delegated or subcontracted users exist. Organisations with full access:

Other organisations have restricted access to names file only.

PIAP has defined the following organisations as non-police and has agreed that authorised users within these organisations may have names file only access commensurate with their previously stated and agreed business needs. Non-police organisations with access to PNC:

Databases PNC contains several separate databases; these include:

… excerpt ends here. Continue reading the full article.

Illustrations

The logo for the Police National Database software used by members of British law enforcement.[1]

Worked examples

Example 1 — a first encounter with Police National Computer

Start with the simplest possible case. Write down what Police National Computer claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Police National Computer before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Police National Computer ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Police National Computer

In research: Police National Computer appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Police National Computer in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Police National Computer is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1974 establishments in the United Kingdom, Biometric databases, Criminal records databases, so understanding it makes those chapters shorter.
In everyday life: Look for Police National Computer outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Police National Computer in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Police National Computer means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Police National Computer out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Police National Computer in simple terms?

Why does Police National Computer matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Police National Computer?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Police National Computer.