Like the name says, this is just about little "blasts from the past."
I was flipping through some old (circa 1990) DC comics when I came across the DC Checklist that they used to print in their more expensive comic books (like Legends of the Dark Knight). At the time I thought their checklist system was kind of weird, but it is especially so looking back at it now.
Read on to see a sample...
It is not that the system is a BAD one, it is just funny to have a checklist of comic books from a company where you need a series of symbols and a LEGEND to understand the checklist.