Contract MonthsThe letters represent the months that these contracts end. For example, "H" represents a contract ending in March and 'Z' is for a contract ending in December.
Tick SizeThis is the value of the smallest amount that price can move per day. In this example a price move of 0.25 is worth $12.50, or a move of 1 is worth $50.
Trading HoursMost markets are electonic today. In this example (when the end of the period is earlier than the beginning) the session starts at 5PM on Sunday and ends at 2PM on Friday.
Initial and Maintenance Margin"Initial" margin is the amount of money you must have in your account to trade each contract ($2,700 in this example). After entering the trade the maintenance margin is always less (in this case it drops to $2,400). Without this a significant enough loss from your entry would result in a margin call. A "margin call" is when a big enough loss results in the brokerage demanding more money to stay in the trade. The appropriate use of protective stops makes this scenario unlikely.
First Notice Day and Last Trading DayThis is a warning to exit the trade and the last day that the particular contract is tradeable.