Rosemont, Illinois-based Comdisco Inc is to reduce the scope of its oil and gas venture partnership operation, which has been accounted for as a discontinued operation since November 11 1991, effectively ending it’s participation in the energy business; consequently Comdisco will take a non-cash, after-tax charge of $20m for the fourth quarter to September 30, while Comdisco’s net realisable cash from the investment is estimated at $55m: it said fiscal 1993 earnings from continuing operations will fall in the range of analysts’ estimates of $1.95 to $1.98 a share.