of collegiate life is such that for many students their college JCR (Junior Common Room, for undergraduates) or MCR (Middle Common Room, for graduates) is seen as more important than OUSU. JCRs and MCRs each have a committee, with a president and other elected students representing their peers to college authorities. Additionally, they organise events and often have significant budgets to spend as they wish (money coming from their colleges and sometimes other sources such as student-run bars). (It is worth noting that JCR and MCR are terms that are used to refer to rooms for use by members, as well as the student bodies.) Not all colleges use this JCR/MCR structure, for example Wadham College's entire student population is represented by a combined Students' Union and purely graduate colleges have different arrangements. Notable alumni Throughout its history, a sizeable number of Oxford alumni, known as Oxonians, have become notable in many varied fields, both academic and otherwise. A total of 70 Nobel prize-winners have studied or taught at Oxford, with prizes won in all six categories. More information on notable members of the university can be found in the individual college articles. An individual may be associated with two or more colleges, as an undergraduate, postgraduate and/or member of staff. Politics Thirty British prime ministers have attended Oxford, including William Gladstone, H. H. Asquith, Clement Attlee, Harold Macmillan, Edward Heath, Harold Wilson, Margaret Thatcher, Tony Blair, David Cameron, Theresa May, Boris Johnson, Liz Truss and Rishi Sunak. Of all the post-war prime ministers, only Gordon Brown was educated at a university other than Oxford (the University of Edinburgh), while Winston Churchill, James Callaghan and John Major never attended a university. Over 100 Oxford alumni were elected to the House of Commons in 2010. This includes former Leader of the Opposition, Ed Miliband, and numerous members of the cabinet and shadow cabinet. Additionally, over 140 Oxonians sit in the House of Lords. At least 30 other international leaders have been educated at Oxford. This number includes Harald V of Norway, Abdullah II of Jordan, William II of the Netherlands, five Prime Ministers of Australia (John Gorton, Malcolm Fraser, Bob Hawke, Tony Abbott, and Malcolm Turnbull), Six Prime Ministers of Pakistan (Liaquat Ali Khan, Huseyn Shaheed Suhrawardy, Sir Feroz Khan Noon, Zulfiqar Ali Bhutto, Benazir Bhutto and Imran Khan), two Prime Ministers of Canada (Lester B. Pearson and John Turner), two