In this sense, LMS means local management of schools in Northern Ireland: a way of running school money. The government still provides the funds, but the school itself — its board and head teacher — decides how to spend that money, instead of the old local education authority doing the day-to-day financial management. So a school might choose more teachers, or repairs, or books, within the rules and the budget it is given. It is an official, administrative term, used in education policy, not in chat. Though actually, the same idea was talked about across the UK as ‘local management of schools’ in the late twentieth century; this entry is the Northern Ireland use of the abbreviation. ‘Local’ here does not mean ‘your neighbourhood’ in a soft way. It means the school is treated as the local manager of its own budget. If you only know LMS from computers, you are thinking of a different expansion entirely (a learning management system: Moodle, Google Classroom, and so on). That is the LMS almost every Taiwanese student meets. The Northern Ireland sense is rare outside UK education documents.