For the purposes of this Act, "copyright " means the exclusive right subject to the provisions of this Act, to do or authorise the doing of any of the following acts in respect of a work or any substantial part thereof, namely:—

(a) in the case of a literary, dramatic or musical work, not being a computer programme,—

(b) in the case of a computer programme,—

(c) in the case of an artistic work,

(d) in the case of a cinematograph film,

(e) in the case of a sound recording,—