A COMPUTER PAPER 9.5" X 11" 3PLY refers to continuous form paper designed for dot matrix and impact printers.The "3PLY" indicates that it consists of three layers of paper, allowing for the creation of multiple copies (originals and duplicates) with a single pass through the printer.

Continuous Form: This paper comes in a continuous roll or fan-fold stack, not individual sheets, and is fed into a printer using a tractor-feed mechanism via holes punched along both sides.

3-Ply (Carbonless): It's composed of three layers. Often, these are NCR (No Carbon Required) paper, meaning they have special chemical coatings that transfer print from the top sheet to the layers below without the need for carbon paper. When pressure is applied (by the printer's pins), the chemicals react to create an image on the underlying plies.

Multi-Part Forms: Ideal for applications where multiple copies of a document are required simultaneously, such as invoices, receipts, purchase orders, delivery orders, reports, and other business forms.

Perforated: Typically features micro-perforations between each sheet for easy separation, and perforations along the sides (pin-feed holes) that can be easily removed to achieve a clean edge.