A&E Networks today promoted the heads of its two big channels. Abbe Raven was named president of A&E and Dan Davids was named president of History Channel. Both had been executive VP and general manager of their channels. The two were put in their current jobs in October 2002, when A&E Networks CEO Nick Davatzes moved Ms. Raven from History Channel and Mr. Davids from A&E. The promotions come with both networks humming. A&E has registered eight consecutive months of double-digit ratings growth and in the past year received 24 prime-time Emmy nominations. For History, 2004 has been the most-watched year in its history.