@Ankush an advice for u.. comprehend any piece of info well before blurting out aggressive comments... Sahana has posted the question under it category so its imperative that she wants suggestions for it 5th sem books... btw books are Automata - Mishra Chandrasekharan/Peter Linz( Language part) and Kohavi (machines part) Operation Research - Kalavathy Object Tech and UML - Schildt/Balagurusamy (Java)and Blaha Rambaugh (UML) Microprocessor - Gaonkar (8085 only)/WBUT book. Operating System - Galvin