At present, all development work has been stopped on EFB, and the version remains fixed at 2.55. Documentation is also available here. CEFB has been adapted for use a general survey data collection system, and is gaining popularity. CEFB has fewer hardware restrictions concerning PC serial port compatibility and memory sizes. You may download the approved version from this site.
Documentation is also available here.
It uses rigorous least-squares algorithms and includes detailed statistical analyses of the results. CEFB is available by following the links in the table below. Included are the program and supporting files. All the files necessary to run the EFB processors. The Survey Safety Handbook in Acrobat Format.