600 Technology
610 Medicine & Health
611 Human Anatomy, Cytology, & Histology
612 Human Physiology
613 Personal Health & Safety
614 Incidence & Prevention of Disease
615 Pharmacology & Therapeutics
616 Diseases
617 Surgery & Related Medical Specialties
618 Gynecology, Obstetrics, Pediatrics, & Geriatrics
619 Unassigned
620 Engineering and Allied Operations
629 Other Branches of Engineering
629.2 Types of Vehicles
629.222 Passenger Automobiles
VIN Decoder – a free tool handy for researching used cars.
629.41 Space Flight, Engineering
NASA Image and Video Library – 140,000 photos, videos & audio files free to search and download.
630 Agriculture
640 Home & Family Management
641 Food & Drink
642 Meals & Table Service
643 Housing & Household Equipment
644 Household Utilities
645 Household Furnishings
646 Sewing, Clothing & Personal Living
647 Management of Public Households
648 Housekeeping
649 Child Rearing & Home Care of People
649.51 Children’s Activities and Recreation
101 Fun Things To Do with Kids This Summer
650 Management & Auxiliary Services
650.14 Job Hunting
Job Resources: CMRLS Virtual Reference
660 Chemical Engineering
670 Manufacturing
680 Manufacture for Specific Uses
690 Construction of Buildings