[Si-Sk]
6321-S01 ----- Sick benefit associations, mutual
3423-S06 ----- Sickles, hand-mfg
1011-S01 ----- Siderite mining
1771-S01 ----- Sidewalk construction, except public-contractors
1611-S01 ----- Sidewalk construction, public-contractors
3292-S03 ----- Siding, asbestos cement-mfg
2952-S04 ----- Siding, asphalt brick-mfg
1761-S03 ----- Siding contractors
2421-S04 ----- Siding, dressed lumber-mfg
5033-S02 ----- Siding, except wood-wholesale
2952-S05 ----- Siding, insulating: impregnated-mfpm-mfg
2621-S04 ----- Siding, insulating paper, impregnated or not-mitse-mfg
3089-S10 ----- Siding, plastics-mfg
3272-S04 ----- Siding, precast stone-mfg
3444-S03 ----- Siding, sheet metal-mfg
4789-S01 ----- SIeeping car and other passenger car operations, not performed by railroads
1479-S02 ----- Sienna mining
2816-S02 ----- Siennas-mfg
3496-S03 ----- Sieves, made from purchased wire-mfg
3569-S04 ----- Sifting and screening machines for general industrial use-mfg
3556-S03 ----- Sifting machines, food-mfg
3827-S02 ----- Sighting and fire control equipment, optical-mfg
3484-S02 ----- Sights, gun: except optical 30 mm. (or 1.18inch) or less-mfg
3489-S01 ----- Sights, gun: except optical-more than 30mm. (or more than 1.18 inch)-mfg
3827-S03 ----- Sights, telescopic-mfg
4522-S01 ----- Sightseeing airplane services
4489-S01 ----- Sightseeing boats
4119-S01 ----- Sightseeing buses
7389-S08 ----- Sign painting and lettering shops
3357-S02 ----- Signal and control cable, nonferrous-mfg
2899-S03 ----- Signal flares, marine-mfg
3825-S03 ----- Signal generators and averages-mfg
3669-S01 ----- Signaling apparatus, electric-mfg
5063-S03 ----- Signaling equipment, electrical-wholesale
3612-S02 ----- Signaling transformers, electric-mfg
3714-S03 ----- Signals, directional: motor vehicle-mfg
3669-S02 ----- Signals: railway, highway, and traffic-electric-mfg
2499-S11 ----- Signboards, wood-mfg
3993-000 ----- Signs and advertising displays-mfg
5046-S02 ----- Signs, electrical-wholesale
5099-S02 ----- Signs, except electric-wholesale
3993-S02 ----- Signs, not made in custom sign painting shops-mfg
2211-S12 ----- Silesia, cotton-mfg
2819-S04 ----- Silica, amorphous-mfg
2819-S05 ----- Silica gel-mfg
1446-S01 ----- Silica mining
1446-S02 ----- Silica sand mining
2819-S06 ----- Silicofluorides-mfg
3291-S04 ----- Silicon carbide abrasives-mfg
3339-S02 ----- Silicon, epitaxial (silicon alloy)-mfg
3339-S03 ----- Silicon, pure-mfg
3339-S04 ----- Silicon refining, primary (over 99 percent pure)-mfg
3295-S02 ----- Silicon, ultra high purity: treated purchased materials-mfg
3674-S04 ----- Silicon wafers, chemically doped-mfg
2821-S01 ----- Silicone fluid solution (fluid for sonar transducers)mfg
2821-S02 ----- Silicone resins-mfg
2822-S02 ----- Silicone rubbers-mfg
2869-S04 ----- Silicones-mfg
2262-S03 ----- Silk broadwoven fabric finishing-mfg
2221-S06 ----- Silk broadwoven fabrics-mfg
2241-S02 ----- Silk narrow fabrics-mfg
5131-S04 ----- Silk piece goods-wholesale
0279-S01 ----- Silk (raw) production and silkworrn farms
5159-S02 ----- Silk, raw-wholesale
7336-S01 ----- Silk screen design
2396-S04 ----- Silk screening on fabric articles-mfg
3552-S02 ----- Silk screens for the textile industry-mfg
2284-S02 ----- Silk thread-mfg
2282-S01 ----- Silk throwing, twisting, winding, or spooling-mfg
2281-S01 ----- Silk yarn, spinning-mfg
5199-S03 ----- Silk yarns-wholesale
1459-S02 ----- Sillimanite mining
3272-S05 ----- Sills, concrete-mfg
1542-S04 ----- Silo construction, agricultural-general contractors
3523-S08 ----- Silo fillers (agricultural machinery)-mfg
3272-S06 ----- Silo staves, cast stone-mfg
2431-S04 ----- Silo staves, wood-mfg
2421-S05 ----- Silo stock, wood: sawed-mfg
3251-S01 ----- Silo tile-mfg
3523-S09 ----- Silo unloaders-mfg
3531-S11 ----- Silos, cement (batch plant)-mfg
3448-S02 ----- Silos, metal-mfg
3272-S07 ----- Silos, prefabricated concrete-mfg
3356-S01 ----- Silver and silver alloy bars, rods, sheets, strip, and tubing-mfg
2819-S07 ----- Silver bromide, chloride, and nitrate-mfg
2819-S08 ----- Silver compounds, inorganic-mfg
3497-S01 ----- Silver foil and leaf-mfg
1044-S01 ----- Silver ore mining
5052-S01 ----- Silver ore-wholesale
1044-000 ----- Silver ores
3399-S01 ----- Silver powder, except artists, materials-mfg
3559-S05 ----- Silver recovery equipment, electrolytic-mfg
3341-S03 ----- Silver, recovery of: from used photographic film-mfg
3339-S05 ----- Silver refining, primary-mfg
3356-S02 ----- Silver rolling and drawing-mfg
3341-S04 ----- Silver smelting and refining, secondary-mfg
3914-000 ----- Silverware and plated ware-mfg
5094-S01 ----- Silver ware and plated ware-wholesale
3914-S01 ----- Silver ware: nickel silver, silver plated, solid silver, and sterling-mfg
5944-S01 ----- Silver ware-retail
3231-S05 ----- Silvered glass, made from purchased glass-mfg
3914-S02 ----- Silversmithing-mfg
2511-S03 ----- Silverware chests, wood (floor standing)-mfg
8641-S01 ----- Singing societies
1521-S01 ----- Single-family home improvements-general contractors
1521-000 ----- Single-family housing construction
2541-S06 ----- Sink tops, plastics laminated-mfg
3949-S05 ----- Sinkers (fishing tackle)-mfg
1241-S03 ----- Sinking shafts for bituminous coal, anthracite, and lignite on a contract basis
1081-S02 ----- Sinking shafts for metal mining: on a contract basis
3431-S04 ----- Sinks: enameled iron, cast iron, and pressed metal-mfg
3088-S02 ----- Sinks, plastics-mfg
3261-S01 ----- Sinks, vitreous china-mfg
3089-S11 ----- Sinkware, plastics-mfg
1011-S02 ----- Sintering of iron ore at the mine
3585-S02 ----- Siphons, soda water-mfg
3669-S03 ----- Sirens, electric: vehicle, marine, industrial, and air raid-mfg
8742-S01 ----- Site location consultants
2899-S04 ----- Size, glue-mfg
2899-S05 ----- Sizes: animal, vegetable, and synthetic plastics materials-mfg
3952-S01 ----- Sizes, artists,: gold and bronze-mfg
3949-S06 ----- Skateboards-mfg
3949-S07 ----- Skates and parts, ice and roller-mfg
7999-S07 ----- Skating instruction, ice or roller
7999-S08 ----- Skating rink operation: ice or roller
7999-S09 ----- Skeet shooting facilities, except membership clubs
3312-S04 ----- Skelp, iron and steel-mfg
3952-S02 ----- Sketching boxes, artists-mfg
2499-S12 ----- Skewers, wood-mfg
7999-S10 ----- Ski instruction
2339-S04 ----- Ski jackets, vests, and pants: women's, misses' and juniors'-mfpm-mfg
7999-S11 ----- Ski lifts, cable lifts, and ski tows operated separately from lodges
7011-S02 ----- Ski lodges and resorts
2329-S03 ----- Ski pants: men's and boys'-mfpm-mfg
7999-S12 ----- Ski rental concessions
2369-S02 ----- Ski suits: girls' and children's-mfpm-mfg
2329-S04 ----- Ski suits: men's and boys'-mfpm-mfg
2253-S05 ----- Ski suits-mitse-mfg
2339-S05 ----- Ski suits: women's, misses' and juniors'-mfpm-mfg
1629-S02 ----- Ski tow erection-general contractors
3537-S01 ----- Skid boxes, metal-mfg
3496-S04 ----- Skid chains, made from purchased wire-mfg
3443-S04 ----- Skid tanks, metal plate-mfg
2411-S03 ----- Skidding logs-mfg
2448-S01 ----- Skids and pallets, wood or wood and metal combination-mfg
3537-S02 ----- Skids, metal-mfg
3732-S02 ----- Skiffs, building and repairing-mfg
5941-S02 ----- Skiing equipment
5091-S02 ----- Skiing equipment-wholesale
8331-S02 ----- Skill training centers
8051-000 ----- Skilled nursing care facilities
2023-S01 ----- Skim milk: concentrated, dried, and powdered-mfg
5941-S03 ----- Skin diving and scuba equipment-retail
3949-S08 ----- Skin diving equipment, except clothing-mfg
3841-S03 ----- Skin grafting equipment-mfg
5159-S03 ----- Skins, raw-wholesale
3111-S03 ----- Skins: tanning, currying and finishing-mfg
2396-S05 ----- Skirt linings-mfg
3111-S04 ----- Skirting leather-mfg
2231-S03 ----- Skirtings-mfg
2337-S01 ----- Skirts, except tennis skirts: women's, misses' and juniors'-mfpm-mfg
2369-S03 ----- Skirts: girls' children's, and infants'-mfpm-mfg
2253-S06 ----- Skirts-mitse-mfg
3089-S12 ----- Skirts, plastics (siding)-mfg
2339-S06 ----- Skirts, tennis: women's, misses' and juniors'-mfpm-mfg
5137-S02 ----- Skirts-wholesale
3949-S09 ----- Skis and skiing equipment, except apparel-mfg
3111-S05 ----- Skivers, leather-mfg
7319-S03 ----- Sky writing
3211-S03 ----- Skylight glass-mfg
1761-S04 ----- Skylight installation-contractors
3444-S04 ----- Skylights, sheet metal-mfg