I have done H.S.C (Arts) in 2005 n now I wanna do some diploma course which feild is better for me to do in just a year

My name is Khushboo doing a part time job in some company.I done my H.S.C(Arts) in d year of 2005,I wanna do some diploma course in a year so which one is better field for me I have interested in computer & I have basic knowledge of computer n done Ms-CIT.kindly suggest me.