The Memorial Union Labor Organization (MULO) was a labor union of student workers and limited-term employees (LTEs) at the Memorial Union and Union South on the University of Wisconsin-Madison campus. Founded in 1971, the organization of workers at the Memorial Union was the result of the upsurge of political activity in the 1960s on the UW-Madison campus. Prior to MULO's formation, the teaching assistants at the University of Wisconsin organized a union, the Teaching Assistants Association (TAA), in 1969. Also, the failed union organization of Checker Cab, involving student workers, led to the establishment of the cabdriver cooperative, , in 1979.