As a parliamentary title it is typically Anglo-Saxon, first recorded in the English parliament for Thomas de Hungerford in 1377; in most other cultures other styles are used, mainly translations of Chairman or President.
Many bodies also have a Speaker pro Tempore or temporary Speaker designated to fill in when the Speaker is not available.
Despite being an impartial position, the Speaker in a Westminster system parliament has to stand for re-election if he wishes to stay. In the Republic of Ireland the Speaker (Ceann Comhairle) is deemed to have been elected if he seeks re-election; in the United Kingdom it is a constitutional convention that no major party will put up a candidate against the 'Speaker seeking re-election'. However in 2005 the Scottish National Party put up a candidate against the incumbent speaker (Michael Martin).
There is one prominent case of a speaker who is not presiding officer. The New York City Council, the unicameral legislative body for New York City, has as its presiding officer the Public Advocate, a position formerly known as City Council President, who is elected by all the voters of the city. As the public advocate's role has changed with several city charter revisions, a post of Council Speaker was created. The speaker is, effectively, majority leader of the council.
According to the federal succession statute currently in effect, the Speaker of the House of Representatives in the U.S. Congress is second in line for succession to the presidency; should the president and vice president be unable to serve, the speaker would become president. Some scholars, however, have argued that this provision of the succession statute is unconstitutional.
The Speaker of the United States House of Representatives is currently Nancy Pelosi (D-CA), who is the first woman ever to serve as Speaker.
Similarly, most U.S. states have bicameral state legislatures with the lower house (variously called the House of Representatives, Assembly, or House of Delegates) led by a speaker, and the upper house (invariably called the Senate) led by a president
Other examples of upper houses whose presiding officer is referred to as a president include those of Australia and Chile.
This pattern is not universal, however. Some upper houses, including that of Canada and several States in the United States, including Tennessee, have a speaker.
In the United Kingdom, the presiding officer of the House of Lords was until recently the Lord Chancellor, who was also a member of the government (a cabinet member) and the head of the judicial branch. The chancellor did not have the same authority to discipline members of the Lords that the speaker of the Commons has in that house. (On 4 July 2006 the office was reformed, and Baroness Haymen, the first "Lord Speaker", took to the woolsack.) (The office of Lord Chancellor remains, though with a modified role and duties.)
The Welsh Assembly and Scottish Parliament have the positions of Presiding Officer which fulfils the same role as the speaker.