V? th? l? tr? th??ng thì x? s? mi?n Nam v?n gi?ng nh? XSMT và XSMB, c? th? nh? sau:123B/124B/125B Customers Handbook If no free memory places can be obtained, a concept pops up for you to overwrite the oldest data set. To carry on: Thrust three to cancel the overwrite for the oldest data set. You will need to delete one or more memory spots and a