Manpower is a term which means a group of persons who have acquired some particular skill or expertisation to undertake a particular type of job. There are various milestones one has to cross to adopt a particular skill or background to perform a job. Tamilnadu software industry has undergone a substantial expansion over the past few years. This has necessitated a corresponding increase in output of suitably qualified graduates from the appropriate training institutions. It is therefore desirable to determine the current and projected size of the industry and to establish whether the projected supply of qualified manpower is sufficient to maintain the current rate of growth. In this paper, a detailed survey of a representative sample of these firms is then carried out and used to estimate recruitment, transfer, promotion and leaving rates.