Old Second Bancorp

Old Second Bancorp is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Computer Applications Networking Systems

North American Industry Classification System (NAICS) Categories:

• Computer Systems Design Services > Computer Networking Systems > Computer Applications Networking Systems

Standard Industry Classification (SIC) Categories:

• Computer Integrated Systems Design > Computer Integrated Systems Design, Nec > Computer Applications Networking Systems