Single Lens Reflex Camera Digital Single Lens Reflex Camera?

Digital Single Lens Reflex Camera? - single lens reflex camera

How do I know the difference between a camera and a digital SLR digital camera?
If the SLR?

http://www.bestbuy.com/site/olspage.jsp?skuId=8879234&st=single+lens+reflex+camera&type=product&id=1212192673855

http://www.target.com/Digital-Cameras/b/ref=nav_t_spc_11_4/191-4053990-1013420?ie=UTF8&node=160213011

http://www.walmart.com/browse/Digital-Cameras/All-Digital-Cameras/_/N-2ygjZ1yzp1qeZaq90Zaqce/Ne-2p4j?path=0% 3A3944 & tab_value = 7521_All & ic = 29_0 & ref = 125,875, 137971 500567, search_sort = 4292587526 & 4 & selected_item = + = 1008559 & catNavId