This proposed first edition of the Standard for Information Technology Equipment - Safety - Part 23: Large Data Storage Equipment, UL 60950-23, is based on the first edition of IEC 60950-23 and specifies requirements for information technology equipment (ITE) with self contained data storage systems that contain hazardous moving parts. These data storage systems are typically large enough to permit a person to enter completely, however, the systems also include similar large equipment permitting complete limb or head access to the area containing hazardous moving parts.