British Overseas citizenship is a form of British nationality under the British Nationality Act 1983. BOCs are British nationals but do not have the right of abode in the United Kingdom. This citizenship is normally for certain people who retained British nationality after independence (e.g. Kenya), but do not have enough ties with the United Kingdom to be British Citizens.
Visa requirements for other classes of British nationals such as British citizens, British Nationals (Overseas), British Overseas Territories Citizens, British Protected Persons or British Subjects are different.