To access multiple (mostly 2) computers at a time, one can use a KVM switch. It is a switch which toggles the access of peripherals between two computers. This is bit costly and KVM switches are not so common in electronics shop in your lane. So, here is an software alternative for KVM.
It is a graphical interface (GUI) for easily configuring Synergy2, an application that allows the user to share his mouse and keyboard between two or more computers.
Also, your clipboard will be shared between the devices. Isn't it cool!!