I vote for lsb/rsb, for a couple of reasons.

• It's the shortest version that makes any sense. In some ways, ob and cb make sense, except that cb tends to be chatterbox around here, and more people think of them as left square bracket and right square bracket
• lsb is shorter than lsqb, and the shorter the better ;)
• I know that lsb is least significant bit(s), but I've seen that more in the world of electrical/computer engineering than in the world of programming, and I doubt many people will really think that about lsb in the least significant bit context
• I trust tye enough to believe the research, so that works for me

This'll be a nice thing to see come through - thanks for working on it! =)

~Brian

Afterthought: What about backslash escaping? hehe