1. 
   xbar
   abbreviation: crossbar
   Found op http://www.apscharts.com/abbrev.html
   
   
2. 
   XBAR
   Crossbar. A kind of multiplexor for which one of a number of channels are hardware-selected. Crossbars are used extensively in the CATV system, and have applications in the Switchyard as well.
   Found op http://www-bdnew.fnal.gov/operations/accgloss/gloss.html
   
   
3. 
   XBAR
   Crossbar. A kind of multiplexor for which one of a number of channels are hardware-selected. Crossbars are used extensively in the CATV system, and have applications in the Switchyard as well.
   Found op http://www-bdnew.fnal.gov/operations/accgloss/gloss.html#A
   
   
4. 
   xbar
   1) Abbreviation
   Found op crossbar
   
   

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