Login to HorizonWebRef.com, the leading online software system for referees, umpires, and officials. Effectively manage your assignments, scheduling, and allocation with our user-friendly platform.

REF collaborates with schools and community partners to fill resource gaps and provide meaningful experiences for Rochester city students. Our work has a profound, positive impact on students’ …

BONUS: Contribute $25+ for a year of Ad-Free Refdesk service as our gift to you. A real-time 3D digital map of Tokyo's public transport system. Jean-Baptiste Lully (1632-1687) is regarded as the father of …

The meaning of REF is a referee in a game or sport.

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Explore and search our database of over 224K identified frequencies and 7.1K trunked radio systems. Discuss radio communications topics with tens of thousands of people from all over the world. …

Check out the history of the NFL, AFL and all of pro football on Pro-football-reference.com

Access your assignments, submit match reports, and manage your availability. Manage referee pools, create and distribute game assignments. Process payments to officials, manage invoices, and …

The #REF! error shows when a formula refers to a cell that's not valid. This happens most often when cells that were referenced by formulas get deleted, or pasted over.