Original sentence: But inside the walls of Atmel, the AVR is affectionately referred to as "Alf and Vegard's Risc".It is also sometimes speculated that AVR might be  the acronym for "Advanced Virtual Risc".Officially, the creators of the AVR give no definitive answer as to what the term "AVR" stands for
Edited sentence: The creators of the AVR give no definitive answer as to what the term "AVR" stands for