This document defines various terms related to data recovery and storage technologies: Ultra SCSI provides fast data transfer speeds of 20 or 40 MB/s, Ultra DMA/33 transfers data at 33.3 MB/s, uncorrectable errors cannot be fixed with error detection, unformatted capacity includes unused space for formatting data, unrecoverable errors cannot be overcome by error correction, and Ultra ATA/100 enables transfer speeds up to 100 MB/s. Uuencode is used to convert 8-bit file formats to 7-bit for email by joining all file bits into a single stream divided into 7-bit chunks.