• Post author:
  • Post category:Adults

The 600s classifications of DDS covers “technology and applied sciences”. Now, wait a minute…didn’t we already cover science in the 500s? What’s the difference and what does “applied” mean in this context? To keep it short and sweet, science is a series of discoveries based on observations of the world around us. Applied science takes that information that you’ve already obtained and gives it a practical application. For example, through a combination of sciences, we know that if heated to the right temperature, sand can be turned into glass, and that glass can be cut to a certain thickness and curve to create a lens that can refract light. Applied science takes than lens and makes it into glasses so that this librarian can see and write this post.

600 (Technology and Applied Sciences)

We briefly discussed applied sciences already, and that’s what you’re going to find in base classification 600. Amongst the titles shelved here, you might find books on philosophy and theory, technical dictionaries and encyclopedias, and technical drawings.

610 (Medicine and Health)

Whether you’re prepping for med school, are trying to diagnose that odd rash you have, or just love to read about disease, then classification 610 is for you! Here, you’ll find everything from human anatomy to personal health and safety, which includes topics like physical fitness, drug abuse, and diet. Also included in this classification are books on disease, forensic medicine, surgery, dentistry, and audiology.

620 (Engineering and Applied Operations)

Whether you’re looking for books in engineering, mechanical properties, masonry, hydraulics, mining, military or nautical engineering, you’ve come to the right place. You’ll also find books on everything from railroads and bridges to dams, sewers, and reservoirs. This classification also covers books on aviation, from planes to hot air balloons and dirigibles. The class ends with 629, which covers cars, trucks, and other land vehicles, while 629.3 covers “air cushion vehicles” like hovercrafts!

630 (Agriculture and Related Technology)

If you’re interested in farming or gardening, then this is the section for you! the 630s cover all aspects of agriculture, from soil science to water conservation and pest control to commercial crops. You can also learn about orchards, animal husbandry (books on horses, cattle, swine, cats, and dogs will be found here, as opposed to 590), processing of dairy products and eggs, hunting, fishing, and the harvesting of invertebrates, such as mollusks.

640 (Home and Family Management)

Home and family management is a fancy catch-all phrase for books about food and drink (including cookbooks), table service, household utilities, and household furnishings. While fashion is shelved in 390 (especially historical fashion and folk costume), you can find books on sewing and clothing in 646. Finally, this section also includes books on management of personal and family life, housekeeping, and child-rearing.

650 (Management and Auxiliary Services)

The 650s cover all aspects of business, from office equipment and methods, writing materials, shorthand, printing and publishing, accounting, management, interviewing, and advertising and public relations. Whether you’re running your own business or have just been promoted to a management position, this classification has plenty of helpful books to recommend.

660 (Chemical Engineering and Related Technologies

We already covered chemistry in 540 and engineering in 620. But, 660 focuses on chemical engineering specifically. That means that these books focus on the practical applications of chemistry, such as chemicals, explosives, foods (not exactly cookbooks, but you can learn about types of foods, like sugars, starches, or even meal preparation methods, such as butchery and seafood processing); light (through gas, oil, or candles), ceramics, clay, bleaching, dying, inks, and paints, as well as metallurgy.

670 (Manufacturing)

This one is pretty self-explanatory. In 670, you’ll learn about all kinds of things and how they are made. Dewey divides up the classification based on what material the product is made of. For example, items made of metal, wood, leather, paper, or textiles. In addition to teaching you how it’s made, this section also focuses on making things yourself. Of course, we’ll find more crafting books later in our MDS journey, with next week’s classification, the 700s.

680 (Manufacture of Products for Specific Uses)

In 670, we looked at manufacturing as a whole. In 680, we see manufacturing products for specific uses. What does that mean exactly? Well, let’s explore with an example. If 675 covers the manufacturing of leather and leather products (this class also includes furs, and imitation leather), 685 goes into specifics, such as harnesses, saddles, and whips (685.1), shoes (685.3), and gloves (685.4). Likewise, books, which can be bound in a variety of materials, from leather to paper, are covered under 686, which is the classification for bookbinding. And perhaps the most interesting and varied subclass here is 688, which covers collectables, with special distinction being given to models, gems and jewelry, pipes and lighters, and toys.

690 (Construction of Buildings)

Whether you’re interested in building a shed or a skyscraper, or maybe just fixing that creaky stair, you’ll want to check out 690. This section covers plans and materials, as well as various how-to guides on everything from roofing to carpentry, and from plumbing to masonry (although not Freemasonry–that’ll be found in 366, Secret Societies). Of course, if you need a manual on car repair, you can also find that here in 699.


I'm the Reader's Advisory Librarian at WPPL. My interests include old horror films, classic novels, manga and anime, paper-crafting, and plants. If you like my suggestions, you can request personalized recommendations from me on My Librarian page.