Grameen is the name of a knitting factory in Dhaka, Bangladesh.
Yes.
... unknit
A marker is a ring placed on a knitting needle between two stitches to remind the knitting that something is supposed to happen there.
symbolism
Ch 3 means make three chains, but is a crochet rather than a knitting term.
Don't know what a yf is but a yj top will not fit a tj.
I found the book "The Manly Art of Knitting" on Amazon.com. I just did a Google search for the term
Yf
The YF-23 Black Widow II is one of two prototypes built of the YF-23 by Northrop and McDonnell Douglass the other called YF-23 is called the Gray Ghost. They both were built but the project was canceled. It was entered in the USAF Advanced Tactial Fighter competition losing to the YF-22 later known as the Lockheed F-22 Raptor.
how do yoy purl next stitch and the next yarn over
Not really. The YF-12A was a fighter prototype designed to destroy enemy bombers. The SR-71 was modified from the YF-12A as a high-speed, high-altitude reconnaisance aircraft, equipped with cameras (not weapons).