511. Sitting Drums 512. Trombone Standing 513. Playing musical instruments, general 514. Standing Horn 515. Bookkeeping 516. Airline Flight Attendant 517. Marching Band, Playing an Instrument, Walking, Brisk Pace, General 518. Coal Mining, Coal Extraction 519. Custodial work, light effort (e.g., cleaning sink and toilet, dusting, vacuuming, light cleaning) 520. Farming, light effort (e.g., cleaning animal sheds, preparing animal feed) 521. Farming, Driving Tasks (e.g., Tractor or Harvester) 522. Farming, Hand Milking, Cleaning Pails, Moderate Effort 523. Firefighters, Raising and Climbing Ladder with Full Gear, Simulated Fire Suppression 2 524. Firefighters, Hauling Hoses on Ground, Carrying/Hoisting Equipment, Breaking Down Walls, etc., in Full Gear 525. Firefighter, Rescue Victim, Automobile Accident, using Pike Pole 526. Fishing, Commercial, Moderate Effort 527. Fishing, commercial, vigorous effort 528. Hunting Large Marine Animals 529. Hunting Large Game, from a Hunting Stand, Limited Walking 530. Hunting, Duck, Wading 531. Pistol Shooting or Trap Shooting, Standing 532. Cleaning, Sweeping Carpet or Floors, General 533. Mopping, Standing, Light Effort 534. Window Cleaning and Washing, General 535. Food Serving, Table Setting, Implied Walking or Standing 536. Vacuuming, General, Moderate Effort 537. Putting away groceries (e.g. carrying groceries, shopping without a grocery cart), carrying packages 538. Food Shopping with Grocery Cart or Without, Standing or Walking 539. Non-Food Shopping, With or Without a Cart, Standing or Walking 540. Knitting, Sewing, Light Effort, Wrapping Presents, Sitting