H
- Hillsborough County
- Hillsborough County School Board
- Hines Hooker Chemical Company
- Houston Center Corporation
- Houston Independent School District
I
- i2 Technology
- Inflow Communications
- IBM Corporation
- Indian River County, Florida
K-L
- Koll Development
- Logix Communications
- Lucent Technologies
M
- McCaslin Properties
- M.W. Kellogg Corporation
- Marathon Oil Company
- MBank/MCorp. (Bank One)
- Merrill Lynch
- Metro Media Fiber Network Services, Inc.
- Metropolitan Washington Airports Authority
- Monroe County School Board, Florida
N-O
- National Aeronautics and Space Administration
- Nextlink
- Neiman Marcus
- NL Industries, Inc.
- Nokia
- Origin Technologies