What do the takeoff and landing Runway Analysis codes mean?

Runway Analysis Takeoff Outputs

Takeoff Thrust (N1, EPR) Aircraft dependent, but typically the static takeoff thrust setting for the given conditions
V1 Takeoff decision speed; where the “go” or “stop” action occurs after deciding to fly or stop
VR Rotate speed; where rotation is initiated
V2 Takeoff safety speed; speed attained 35 ft above runway surface with one engine inoperative; also target climb speed after engine failure to maintain during 1st and 2nd segments until level-off altitude is reached
VFTO Final takeoff speed; target climb speed during Final segment
VENR Enroute speed, after clearing all obstacles
TOFL Takeoff Field Length; takeoff distance per AFM definition for the aircraft
Accelerate-Stop Accelerate-Stop distance; distance from brake release through V1 plus stopping distance from V1 through full stop during a rejected takeoff
Accelerate-Go Accelerate-Go distance; distance from brake release through V1 plus the distance from V1 through rotation until 35 ft above runway surface is reached 
1st/2nd Gradient Climb gradient for the indicated climb segment
Level-Off MSL / Level-Off Alt Target level -off altitude (in MSL) to clear all obstacles during a one-engine inoperative takeoff


Runway Analysis Landing Outputs

VAPP Approach speed; a target speed flown during the approach phase of the landing, typically at approach flap setting and gear up.
VREF Reference speed; a target speed slower than VAPP flown at landing flap settings and gear down to be achieved by 50 ft height and when crossing the landing threshold.
Actual Distance Actual landing distance provided by the AFM for the given surface condition.
Factored Distance Actual landing distance increased by a factor multiplier, such as 1.67 for the 60% Dry runway dispatch requirement.
Approach/Landing Gradient Approach or Landing climb gradient for the AFM defined aircraft configuration