What is JPEG, PDF files ?
JPEG (Joint Photographers Experts Group) is a file compression algorithm used for image compression. JPEG is so popularly know and used because its widely supported and uses the best compression algorithm for images transferred through internet. JPEG is the best way. But if image is copied to a CD or Zip and then transferred, its better to keep the original format (TIFF, EPS, PSD, etc). Since JPEG compression is a loosy compression (means some data will be disordered while compression). PDF (Portable Document Format) is a file format by Adobe. This file format helps to view, partially edit files originally made in almost any designing/word processing software. A PDF file can be viewed using Acrobat Reader.