: "4SD" likely refers to the Standard Definition (480i) version of the episode, which was the original broadcast format. While modern restorations (HD/4K) offer better clarity, the SD version maintains the grainy, atmospheric aesthetic of 1970s television that many fans prefer for horror.
: "4d" (4-day) or "4SD" (4 Standard Deviations) is often used in medical studies involving activity diaries or energy expenditure recordings. [18 ] The Diary 4SD
In this segment, a cruel gossip columnist—who takes pleasure in ruining reputations—receives a mysterious diary that begins to record future events rather than past ones. : "4SD" likely refers to the Standard Definition