TY - BOOK AU - AWUONDA, GORDON OKOTH TI - EVALUATION OF THE CHANGE-OVER PROCESS OF OPERATING SYSTEMS ON USERS' PERFORMANCE: A CASE STUDY OF KISII UNIVERSITY,KENYA AV - THE QA 76.76 .A98 2013 PY - 2013/// CY - KISII PB - KISII UNIVERSITY N1 - INCLUDES REFERENCES ER -