The developments in information technology are changing the way people communicate, locate, retrieve and use information. Libraries and information centres have been embracing these challenges posed by this new scenario more profoundly and are using IT services, devices and electronic products. Use of computers, linking with networks and internet, digitization of material and handling audio-visual material etc. are now important components in transforming traditional organizational structures into new institutional entities. This manual has been planned to achieve all these goals. The various functions and 'day-to-day' jobs to be performed have been explained in 'how-to-do' step by step with specimen of letters and essential notes, comprehensive guidance about automation of the library and use of internet, web sites and net-working, has been provided. Important documents pertaining to up-gradation, pay scales, ACP Scheme, important court decisions in favour of library staff and latest government of India norms for determining the strength of library staff, have been appended. The library and information science students, teachers, practitioners and all those who are interested in libraries, may find this manual useful.