With Labor Day arriving Monday, our thoughts turn to the hardworking sitcom characters we've watched toiling away at their weekly jobs. But only a handful of workplace comedies have true staying power -- like this elite group, ranked by number of seasons:

11 SEASONS:

"Cheers," 1982-1993

 

10 SEASONS:

"Murphy Brown," 1988-98

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SEASONS:

"The Office," 2005-13

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"Night Court," 1984-92

"Alice," 1976-1985

 

SEASONS:

"Barney Miller," 1975-82

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"Wings," 1990-97

 

SEASONS:

"The Mary Tyler Moore Show," 1970-77

"Designing Women," 1986-93