A--- Banking
B--- Business opportunity
C--- Career
D--- Continuing Education
E--- Computers
F--- Customer Service
G--- Drivers
H--- Employment Agencies
I--- General
J--- Government opportunities
K--- Insurance
L--- Management
M--- Medical Treatment
N--- Office
O--- Restaurant / Hotel
P--- Sales
Q--- Services
R--- Skilled / Technical
Example: (R) 熟练的/技术性的 (K) 保险