AS IN CONDITION!!! This is a Texas Instruments solid state software constant memory calculator. Single owner. This was purchased in 1977 to use in college and engineering school. It is all original and intact. It is functional (see video). It comes with the case, master library, and power cord. You will receive everything pictured. It was very expensive when purchased, and top of the line. It was used in the engineering field and well cared for. This vintage item is 49 years old! The original battery pack is included, but doesn't work, and one of the battery terminals is off (see photos!!!) This only works with the power cord. This item has NOT been tested. I was able to add, subtract, multiply, and do a log rythmn. This calculator has NOT been refurbished. This is for a vintage tech collector. AS IN CONDITION!!! Please ask questions, and examine each photo.