An MSP is a British politician who has a seat in the Scottish Parliament, in Edinburgh. The letters stand for Member of the Scottish Parliament. Scotland has its own parliament for many local laws — schools, hospitals, roads — while some bigger UK questions still go to London. You write MSP after a name, the way you write MP for someone in the London parliament. It is a news-and-politics word, mainly in stories about Scotland; you will not hear it much in Taiwan, and even in England it is a newspaper word, not everyday chat. Though actually, an MSP is not an MP. An MP sits in Westminster. They are different jobs, even if both are 'members of a parliament'. Those three letters can mean other things in business or tech; in a politics text about Scotland, this is the one.