Home : Software Terms : Digital Signature Definition. Digital Signature. Signatures are commonly used to authenticate documents. When you sign a physical document, you are authenticating its contents. Similarly, digital signatures are used to authenticate the contents of electronic documents. They can be used with PDF, e-mail messages, and word processing documents.
P195/60R15 87S - The load index (87) is the tire size's assigned numerical value used to compare relative load carrying capabilities. In the case of our example the 87 identifies the tires ability to carry approximately 1,201 pounds. The higher the tire's load index number, the greater its load carrying capacity.
1 Load index and speed rating are sometimes not mandatory for flotation sizes, but must be for any tire approved for street and highway use. 2  2- or 3-digit number: Load index; see table below.  1- or 2-digit/letter combination: Speed rating; see table below.