Portsmouth | Portsmouth F.C. | Portsmouth, New Hampshire | Portsmouth, Ohio | Portsmouth Abbey School | Portsmouth, Virginia | HMNB Portsmouth | University of Portsmouth | Portsmouth International Port | Portsmouth Cathedral | Portsmouth, Rhode Island | Portsmouth, Dominica | Portsmouth Harbour railway station | Portsmouth and Southsea railway station | Portsmouth Naval Prison | Rajabagan Dockyard | Portsmouth Invitational Tournament | Louise de Kérouaille, Duchess of Portsmouth | Chatham Dockyard | Treaty of Portsmouth | Royal Naval Dockyard, Bermuda | Royal Naval Dockyard | Portsmouth Direct Line | Rosyth Dockyard | Portsmouth Point | Portsmouth Naval Shipyard | Portsmouth Block Mills | Oliver Wallop, 8th Earl of Portsmouth | Norfolk and Portsmouth Belt Line Railroad | Malta Dockyard |
In 1817, a burglary in Portsmouth Dockyard which had been carried out using false keys to gain entry prompted the British Government to announce a competition to produce a lock that could be opened only with its own key.
Mass production using interchangeable parts was first achieved in 1803 by Marc Isambard Brunel in cooperation with Henry Maudslay, and Simon Goodrich, under the management of (with contributions by) Brigadier-General Sir Samuel Bentham the Inspector General of Naval Works at Portsmouth Block Mills at Portsmouth Dockyard for the British Royal Navy during the Napoleonic War.