Tender For corrigendum : providing of annual maintenance service - desktops, laptops and peripherals - desktop pc; acer,annual maintenance service - desktops, laptops and peripherals - desktop pc; hp,annual maintenance service - desktops, laptops and peripherals - all in one pc; hp,annual maintenance service - desktops, laptops and peripherals - all in one pc; dell,annual maintenance service - desktops, laptops and peripherals - laptop; acer,annual maintenance service - desktops, laptops and peripherals - laptop; lenovo,annual maintenance service - desktops, laptops and peripherals - laptop; hp,annual maintenance service - desktops, laptops and peripherals - laptop; apple,annual maintenance service - desktops, laptops and peripherals - scanner; apple,annual maintenance service - desktops, laptops and peripherals - ups (offline 600-650 va); microtek,annual maintenance service - desktops, laptops and peripherals - ups( offline 1 kva); uniline,annual maintenance service - desktops, laptops and peripherals - printer (monochrome , laser