On Sat, Mar 20, 2021, 16:13 Paul Koning <paulkoning at comcast.net> wrote
Speculating here since I have no direct knowledge: the
DECtape format
allows read and write in either direction, while LINCtape only allows read
and write forward. The bidirectional I/O capability was part of DECtape
format from the start, and I suspect the desire was to keep that.
What systems took advantage of the bidirectional nature?
Kyle