Portable Document Format or PDF files are documents that have been converted from printable source material, such as Microsoft Word or Excel files. PDF documents may be color or grayscale. PDF files ...

One common issue while sending emails is when they keep bouncing back. The non-delivery report mentions the error as the presence of an illegal attachment. This ...

I've got a lot (250+) of .gif files that I want to convert to greyscale .bmp files. Are there any free programs that I can do this with easily?