| MS_ACCESSORY | Accessory | Includes shoes, purses, belts, etc. |
| MS_APPAREL | Apparel | Includes the purchase of clothing. MS_ACCESSORY, MS_KIDAPP, MS_MENAPP, and MS_WOMAPP are included in the overall MS_APPAREL variable. |
| MS_AUDIO | Audio | Includes purchases related to audio equipment. |
| MS_AUTO | Automotive | Includes purchases related to Cars/Trucks |
| MS_AVIATION | Aviation | Includes purchases of aviation related items. |
| MS_BARGAINS | Bargain Seekers | Includes purchases of low-cost or on-sale products from catalogs, retail and websites |
| MS_BIBLE | Bible | Includes purchases of religious items |
| MS_BOATSAIL | Boating/Sailing | Includes boating, sailing, canoeing, kayaking, water skiing, rafting, etc |
| MS_BOOKS | Books | Number of distinct book company participants. |
| MS_BUSINESS | Business | Includes business news, and/or products usually associated with running a business or a career or operating an office |
| MS_CAMP | Camping | Includes camping and hiking |
| MS_CATALOG | Catalog | Number of different catalogs ordered from. |
| MS_COLLECTIBLES | Collectibles | Includes dolls, coins, stamps, stuffed animals, plates, memorabilia, etc. |
| MS_COMPUTERS | Computers | Includes Computers, software and computer accessories |
| MS_COOKING | Cooking | Includes recipes, cooking utensils and food products |
| MS_BEAUTY | Cosmetics/Beauty Products | Includes purchases of Beauty & Cosmetic items |
| MS_CRAFTS | Crafts | Includes crochet, sewing, knitting, needlepoint, quilting, jewelry, ceramics, painting, etc. |
| MS_CULTUREARTS | Culture Arts | Includes art, antiques, opera, museums, the theatre, etc. |
| MS_CURREVENT | Current Events | Includes periodicals, news magazines, websites & blogs |
| MS_DIY | Do It Yourself | Includes home improvements and construction, wood working, auto repair, etc. |
| MS_ELECTRONICS | Electronics | Includes home and auto stereos, video equipment, etc. Does not include computers. |
| MS_EQUESTRIAN | Equestrian | Includes purchases related to horses/horse riding |
| MS_FAMILY | Family | Includes products designed for families with children. |
| MS_FICTION | Fiction | Include books & magazines of fiction |
| MS_FISHING | Fishing | Include fishing paraphenalia as well as books & publications related to fishings |
| MS_FITNESS | Fitness | Includes purchases of fitness equipment, clothing, accessories as well as subscribers to publications and books. |
| MS_FOOD | Food And Drink | Includes purchases of any food item |
| MS_FUNDRAISING | Fundraising | Number of different charitable organizations to which a donation was made. |
| MS_GAMES | Games | Includes computer games, traditional board games, puzzles, etc. |
| MS_GARDEN | Gardening | Includes purchases of gardening products, plants, seeds, books etc. Also includes subscribers to gardening publications |
| MS_MERCHANDISE | General Merchandise | Includes catalog items not classified under any other affinity. |
| MS_GIFTGIVR | Gift Giver | Number of orders that were given as gifts. |
| MS_GIFTEE | Giftee | Number of orders that were received as gifts. |
| MS_GIFTS | Gifts | Includes products usually given as gifts. |
| MS_GOURMET | Gourmet | Includes upscale products, and fine foods, wines, and other expensive items. |
| MS_HEALTH | Health | MS_FITNESS is included in MS_HEALTH. Also includes health related items which are not fitness |
| MS_HISTORY | History | Includes purchases of books/publications related to history |
| MS_HOLIDAY | Holiday | Includes items related to the holidays, usually Christmas. |
| MS_HOMEDECR | Home Decorating/Furnishings | Includes furniture as well as other home décor items such as rugs, vases, pictures etc. |
| MS_HOMELIV | Home Living | MS_CAT_HOMELIV, MS_PUB_HOMELIV, MS_HOMEDECR, MS_PUB_HOMEDECR, MS_CAT_HOMEDECR, MS_CAT_GARDEN, MS_COOKING, MS_PUB_COOKING, MS_GARDEN, MS_PUB_GARDEN, and MS_HOUSEWARES |
| MS_HOUSEWARES | Housewares | Includes housewares excluding large appliance purchases |
| MS_HUMOR | Humor/Comics | Includes comic books and strips, cartoons, comedies, etc. |
| MS_HUNTING | Hunting | Includes purchases of all types of hunting related items (including rifles, bows etc) as well as subscribers to hunting publications |
| MS_INSPIRATION | Inspiration | Includes non-religious products, such as new age products, astrology, etc. |
| MS_KIDAPP | Kids Apparel | Includes all types of children’s apparel |
| MS_MAGS | Magazines | Number of distinct participating magazine titles. |
| MS_MENAPP | Men’s Apparel | Includes all types of men’s apparel |
| MS_MOTORCYCLES | Motorcycles | Includes all types of motorcycles/motorcycle related products and subscriptions to motorcycle publications |
| MS_MUSIC | Music | Includes music, music playing equipment, and musical instruments. |
| MS_MONEYMAKING | Op Seekers | Includes moneymaking opportunities, usually of the get-rich-quick nature. |
| MS_OUTDOORS | Outdoors | MS_BOATSAIL, MS_CAMP, MS_FISHING, and MS_HUNTING are included in MS_OUTDOORS. |
| MS_PFIN | Personal Finance | Includes all types of personal finance (including magazines) |
| MS_PETS | Pets | Includes purchase of all types of pet products including cats and dogs |
| MS_PHOTOPROC | Photo Processing | Includes companies that offer film processed via the mail or the Internet. |
| MS_PHOTO | Photography | Includes products/magazines related to photography |
| MS_PUBLISH | Publish | Number of distinct publishing participants, counting individual magazines and book companies |
| MS_PUB_COOKING | Publish Cooking | Includes all types of cooking publications & books |
| MS_PUB_FAMILY | Publish Family | Includes all types of family/children publications & books |
| MS_PUB_GARDEN | Publish Gardening | Includes all types of gardening publications & books |
| MS_PUB_GIFTGIVR | Publish Gift Giver | Indicates number of magazine subscriptions given as a gift |
| MS_PUB_GIFTEE | Publish Giftee | Indicates number of magazine subscriptions or book orders received as a Gift. |
| MS_PUB_HOMEDECR | Publish Home Decorating/Furnishings | Includes all types of publications & books related to home décor and furninishings |
| MS_PUB_HOMELIV | Publish Home Living | Includes all types of publications & books related to home living |
| MS_PUB_OUTDOORS | Publish Outdoors | Includes all types of publications & books related to outdoors (includes hunting, fishing, camping, hiking, some watersports) |
| MS_SCIENCE | Science | Includes products, magazines & books related to science |
| MS_SPORTS | Sports | Includes products, magazines & books related to sports |
| MS_TRAVEL | Travel | Includes products, magazines & books related traveling & vacations |
| MS_TVMOVIES | Tv/Movies/Video | Includes purchases of videos, subscribers to streaming services as well as magazine subscribers |
| MS_WILDLIFE | Wildlife/Environment | Includes purchasers of products related to Wildlife and the environment as well as donors & magazine subscribers |
| MS_WOMAN | Woman | Includes generic women’s publications. |
| MS_WOMAPP | Women’s Apparel | Includes all types of women’s apparel |
| MS_WOMFASH | Women’s Fashion | Includes publications related to women’s fashion. |
