[1.] ESI Overview
[1.1] Echellette Mode[2.] User Interface[1.2] Low-Dispersion Mode
[1.3] Direct Imaging Mode
[2.1] Introduction and Guiding Philosophy[3.] Slit / Filter Wheels[2.2] The Upper-level Panel
[2.3] The Lower-level Panels
[2.3.1] ....[2.3.2] ...
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[4.] Field Acquisition and Guiding
[5.] Performance and Count Rates
[6.] CCD Characteristics
Appendix 1: Line Lamp Identifications
Appendix 2: ESI Line Lists in IRAF Format