Analog 6, edited by John W. Campbell. All stories from Analog - and all from 1966. "Light of Other Days" was a Hugo & Nebula nominee; "Call Him Lord" won the Nebula award for best novelette, and was a Hugo nominee.

(Introduction by John W. Campbell)
"Protopath" by Keith Laumer
"Bookworm, Run!" by Vernor Vinge
"The Easy Way Out" by Lee Correy
"Giant Meteor Impact" by J. E. Enever (article)
"Early Warning" by Robin S. Scott
"Call Him Lord" by Gordon R. Dickson
"CWACC Strikes Again" by Hank Dempsey (= Harry Harrison)
"Stranglehold" by Christopher Anvil
"The Message" by Piers Anthony + Frances Hall
"Light of Other Days" by Bob Shaw
"Something to Say" by John Berryman
"Letter from a Higher Critic" by Stewart Robb
"...Not a Prison Make" by Joseph P. Martino
"10:10 A.M." by Alexander B. Malec