CFL

1. abbreviationinitialismInitialism of Canadian Football League.

   Scenarios were floated that the CFL and WLAF would merge or that the CFL would revert to a fall schedule and become a farm league for the NFL.

   2005, Steve O'Brien, The Canadian Football League, →ISBN

plural CFLs

1. abbreviationcountableinitialismuncountableInitialism of compact fluorescent lamp.

   1 more example

   “Now is the right time to transition from CFL to LED,” said John Strainic, chief operating officer of consumer and conventional lighting at GE Lighting. […] Halogen dominates standard bulb shipments, the association reported, representing almost half of the total, followed by CFLs at about 27 percent, a share that is on the decline.

   2016 February 1, Diane Cardwell, “G.E. to Phase Out CFL Bulbs”, in The New York Times, archived from the original on 06 Feb 2016

2. abbreviationcountableinitialismuncountableInitialism of context-free language.
3. abbreviationcountableinitialismuncountablenatural sciencesInitialism of color–flavor locking.