The Gruen zones is a system of dividing the interface between the femoral component of a hip arthroplasty and the femur bone moving from lateral to medial calcar, when viewing an AP radiograph of the hip, clinically useful to record the appearance of lucent areas when assessing the outcome of the operation.
This article is about the band. For other uses, see AC/DC (disambiguation). AC/DC are an Australian rock band, formed in 1973 by brothers Malcolm and Angus Young. A hard rock/blues rock band, they have also been considered a heavy metal band, although they have always dubbed their music simply rock and roll.
The short answer is the letters AC represent the amendment to the wireless network standard, IEEE 802.11. The letters, as far as I know, are not acronyms. As for the AC7260, it is a dual band wireless adapter. Dual band means that this adapter can operate at either the 2.4GHz frequency, or the 5GHz frequency. The 2.4GHz band is used by B, G, and N generation devices. Wireless AC strictly uses the 5GHz frequency.