Since getting back into cards.......

I've read through the 2007 Topps Heritage thread and could someone please explain some of the variations to me ? Such as the Yellow Label , Chrome , SP , and the rest of the sub-types . Sorry I haven't collected in quite a while and need to be educated !!
A big thanks to anyone who can help !!

Looking for Atlanta $1-$20 Series 1928-present + Stars , Raw or Graded !! &
FR-1509 ,FR-1509*,FR-1510,FR-1510*,FR-1511*,FR-1512*,FR-1514*
in PCGS 66 or 67PPQ**
EBAY ITEMS
Check out - BrettEldredge.com !! Hometown Singer
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Looking for Atlanta $1-$20 Series 1928-present + Stars , Raw or Graded !! &
FR-1509 ,FR-1509*,FR-1510,FR-1510*,FR-1511*,FR-1512*,FR-1514*
in PCGS 66 or 67PPQ**
EBAY ITEMS
Check out - BrettEldredge.com !! Hometown Singer
Chrome-a "chrome" like finish over the front of the card. Makes it shiny and pretty.
SP-Short Print
Im unsure of the others you mention. LMK and I'll try to explain.
The chrome cards are what would be considered a parallel set. They make each card in a Chrome Variation similar to how Topps had the Gold Card variation to the 1992 Topps Set. Since each and every card has a chrome version, those are considered a parallel set instead of a variation of a few base set cards.
SP is where Topps, on purpose, printed much fewer of these cards than the rest of the set. Again, this is to force people to buy more packs in order to find these short printed cards if they want a full set. This also drives up the price on the aftermarket and causes the overall price of the set to go upward since in order to complete the set, people had to spend a lot more money to get these short-printed cards.
Looking for Atlanta $1-$20 Series 1928-present + Stars , Raw or Graded !! &
FR-1509 ,FR-1509*,FR-1510,FR-1510*,FR-1511*,FR-1512*,FR-1514*
in PCGS 66 or 67PPQ**
EBAY ITEMS
Check out - BrettEldredge.com !! Hometown Singer