"SMS" is an abbreviation for "Special Mint Set". The US Mint did not produce any proof sets for collectors in the years 1965, 1966, 1967. Instead they produced what were called "Special Mint Sets". Generally they have better detail and luster than the everyday business strikes made for circulation. Proof set production was resumed in 1968.
Special Mint Set
BU is the abbreviation for Brilliant Uncirculated.
Bright Uncirculated. I.e., never spent and still with its original mint lustre.
"VF" stands for Very Fine in coin grading. Coins in VF condition typically show moderate wear on the high points of the design, but the overall details are still fairly sharp and distinct.
SMS means Short Message Service
The SMS stands for "Send Me a Sign"
Short Message Service
Very fine condition
In America, "RD" is an abbreviation for "red", a grading-service color designation for copper coins.
Short Message Service
A coin placed in a plastic container by a grading service.
Many coin shops can submit coins for grading. Also if you are a member of a grading service you may be able to submit them yourself.
Short Message Service