Filename Extensions
Many file systems, including FAT, NTFS, and VMS systems, allow a filename extension that consists of one or more characters following the last period in the filename, dividing the filename into two parts: a base name or stem and an extension or suffix used by some applications to indicate the file type. Multiple output files created by an application use the same basename and various extensions. For example a compiler might use the extension FOR
for the source input file, OBJ
for the object output and LST
for the listing. Although there are some common extensions they are arbitrary and a different application might use REL
and RPT
. On filesystems that do not segregate the extension, files will often have a longer extension such as html
.
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“If we focus exclusively on teaching our children to read, write, spell, and count in their first years of life, we turn our homes into extensions of school and turn bringing up a child into an exercise in curriculum development. We should be parents first and teachers of academic skills second.”
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