2.	Acoustical Consultant (6)

3.	Acoustical Contractor (6)

4.	Acoustical Material (6)

5.	Actuator (3)

6.	Aeronautical Supply (1)

7.	Architect (103)

8.	Architecture (21)

9.	Architectural Illustrator (7)

10.	Grit Blasting (17)

11.	Blasting Equipment (10)

12.	Centrifugal Machinery (1)

13.

Chart (3)

14.	Computer Maintenance Engineer (9)

15.	Engineering Contractor (116)

16.	Contractor's Equipment Repair (19)

17.

Core (1)

18.	Cornice (2)

19.	Coupling (12)

20.	Decalcomania (1)

21.	Commercial Designer (9)

22.	Air Conditioning Engineer (13)

23.	Architectural Engineer (8)

24.	Civil Engineer (125)

25.	Engineer Consultant (88)

26.	Professional Consulting Engineer (54)

27.	Engineer Design (6)

28.	Electrical Engineer (55)

29.	Electronic Engineer (12)

30.	Environmental Engineering (14)

31.	Gas Engineer (7)

32.	Industrial Engineer (7)

33.	Marine Engineer (38)

34.	Mechanical Engineer (38)

35.	Structural Engineer (9)

36.	Engineering (468)

37.	Engineering Equipment (37)

38.	Engineering Services (561)

39.	Consulting Engineers (11)

40.	Mech Engineers (10)

41.	Electric Fan (3)

42.	Gauge (10)

43.	Architectural Glass (20)

44.	Hardware Wholesale (478)

45.	Heat Exchanger (23)

46.	Heater Manufacturing (9)

47.	Heater Seller

48.	Heating Equipment (12)

49.

Jigs (6)

50.	Lapping (1)

51.	Lighting Fixtures Store (91)

52.	Lightning Protection System (8)

53.	Logging Company (1)

54.	Logging Equipment (4)

55.	Space Frame (2)