Who invented 'Touch System' of typewriting ? 

Excess oiling attracts the dust particles fall into the typewriter may cause: 

Short cut key used for selecting a full document. 

Spacing between the boundary of the cell and text inside the cell in a word table.

The size of A4 printing paper recommended by the International Standard Organization. 

The first word of the subsequent page which is typed on the right side of the bottom margin of the preceding page is called as: