Near-Infrared Camera ARNICA: Data Reduction. ARNICA (ARcetri Near Infrared CAmera) is the imaging camera for the near infrared bands between 1.0 and 2.5 micron that Arcetri Observatory has designed and built as a general facility for the TIRGO telescope. To use the packages first start IRAF using the 'cl' command and at the 'cl>' prompt type 'arnica'. Extensive online documentation is available on the Web at: http://www.arcetri.astro.it/irlab/instr/arnica/arnica.html The ARNICA User's Manual is available in two different forms: Postscript files at the IRA web address Manuals in room 307 Contact Person: F.Tinarelli tinarelli@ira.inaf.it