On: All hyped up for Hypercard: further adventures with an Apple legacy format

[Someone]

FTA:

For instance, a stack file begins with a stack block (signified by the hexadecimal values, “53 54 41 4B,” which correspond to the ASCII characters, “STAK”), and the file is terminated by a tail block (signified by the ASCII characters, “TAIL”

[duskwuff → Someone]

Fun fact: the tail block contains the constant string "Nu är det slut…", Swedish for "this is the end".