As you are a graduate with Chemistry, Botany and Zoology there are many options .If interested in teaching you can take B.Ed and then teach in high schools. You can pursue PG in any of these subjects (CBZ) and prepare well for NET, which will make you eligible for lectureship. After B.Ed you can do M.Ed and then try job in teacher training institutes. You can also try for government jobs, banks and other competitive exams in various fields. You can also think of studying genetics or other super specialized fields like plant anatomy, physiology, horticulture, neurology, biotechnology, biochemistry. Research and development is also a sort after field. As u are interested in computer field you can pursue any computer courses