taff associate Yan Liu, left, and instructor Xiao-Wei Sun, both of the pathology department, were two of the many Columbia employees to sample CD-ROM course offerings at last Tuesdays open house for the Columbia Human Resources Multimedia Learning Center. The MLC is a dedicated computer facility where all Columbia officers and support staff can go to enhance their computer and professional skills. The MLC has daytime hours in 212A Lewisohn and evening hours in 321A IAB/Lehman. For information or to make an appointment, call 854-2771.