[en] The ENDF/B data library has recently been updated and is now available through the National Nuclear Data Center (NNDC), Brookhaven National Laboratory. This most recent library is identified as ENDF/B- VI, Release 4. This release completely supersedes the preceding release, Release 3, distributed in January 1996. As distributed the ENDF/B-VI, Release 4 data includes cross sections represented in the form of a combination of resonance parameters and/or tabulated energy dependent cross sections, nominally at 0 Kelvin temperature. For use in applications this library has been processed into the form of temperature dependent cross sections at eight temperatures between 0 and 2100 Kelvin, in steps of 300 Kelvin. At each temperature the cross sections are tabulated and linearly interpolable in energy. The all results are in the computer independent ENDF/B-VI character format, which allows the data to be easily transported between 2 computers. It is approximately 1 gigabyte in size and is distributed on two CDs