Yearly accomplishments for the period of 1 April 2001 through 31 March 2002 by Christian A. Hummel The accomplishments include: 1: Presented a talk on "Applied binary star research" at the Michelson Summer School on Optical/IR Interferometry held in May at the Lowell Observatory. Also designed and executed laboratory exercises (i.e. data reduction of real NPOI data using the OYSTER software) with the school participants. For one of the exercises, imaging of a binary star, OYSTER's new imaging procedures were used. 2: Second author on a paper by M. Wittkowski on "Direct multi-wavelength limb-darkening measurements of three late-type giants with the Navy Prototype Optical Interferometer" in the Astronomical Journal. 3: Attended a meeting of the IAU working group on optical and IR interferometry, and moderated a session on common software. The meeting was held in France in August. 4: Made an image of the triple star Eta Virginis from the new NPOI 6-station array data. Co-authored press release on this result with the NPOI team. Here I list separately what I have done to maintain and improve the NPOI data reduction software, comprising CONSTRICTOR and OYSTER (I have listed only larger projects): 1: OYSTER's imaging procedures were expanded to include a new multi-wavelength version of the CLEAN algorithm specifically designed for stellar sources. 2: Several analysis procedures regarding 5-beam siderostat pivot metrology data were added to OYSTER and used to reduce a 25 night astrometric campaign from March to June. After reanalysing centered feed data from 1999-03-06, it was discovered that the feed position probably was the culprit for not achieving good star positions in the 2001 campaign even though the dispersion correction worked very well. 3: Even though OYSTER was designed for 6-way beam combination, various updates were necessary with the new 6-way data, the most notable being the addition of sub-array capability. 4: Both the manual and the installation of the OYSTER software were updated and simplified, respectively. OYSTER was installed on two Solaris platform, one at Lowell, and the other at NRL.