Standard features are a bar code reader and a Remote Management Unit (RMU). In this  chapter, the terms  RMU  and  web user interface  are used interchangeably. This chapter includes the following sections: For the remainder of this chapter, we use the terms  TS3100  and  TS3100 tape  l ibrary  as  abbreviations for the IBM TS3100 tape library. 234  IBM Tape Library Guide for Open Systems GLYPH<SM590000> 9.1, “Product description” on page 235 GLYPH<SM590000> 9.2, “TS3100 tape library components” on page 238 GLYPH<SM590000> 9.3, “IBM LTO Ultrium tape drives” on page 244 GLYPH<SM590000> 9.4, “Physical attachments” on page 247 GLYPH<SM590000> 9.5, “Media” on page 249 GLYPH<SM590000> 9.6, “Specifications” on page 251 GLYPH<SM590000> 9.7, “Feature codes” on page 252