Telecommunications customer database
Geographic indicator
Months with service
Age in years
Marital status
Years at current address
Household income in thousands
Level of education
Years with current employer
Retired
Gender
Number of people in household
Toll free service
Equipment rental
Calling card service
Wireless service
Long distance last month
Toll free last month
Equipment last month
Calling card last month
Wireless last month
Long distance over tenure
Toll free over tenure
Equipment over tenure
Calling card over tenure
Wireless over tenure
Multiple lines
Voice mail
Paging service
Internet
Caller ID
Call waiting
Call forwarding
3-way calling
Electronic billing
Log-long distance
Log-toll free
Log-equipment
Log-calling card
Log-wireless
Log-income
Customer category