More Info Regarding File Extension 1
This becomes useful when a user wishes to transfer a large file from one computer to another but does not have the adequate space to do so in one go. The File Splitter can also be used to break down large e-mail attachments, circumventing attachment size limits. The file extension 1, in this case, is a File Splitter split file portion.
The .1 file extension is also used by other applications for a variety of files serving different uses. The UNIX operating system uses the .1 file extension for the roff/noff/troff/gruff unformatted manual page. These manual pages are included in compiled applications and come in "nroff encoded" and plain text format. While the plain text format can be easily read, the nroff encoded format has to be formatted using an nroff utility. Most commands on UNIX and LINUX machines usually have an associated manual page, varying in degrees of detail and comprehensiveness. Meanwhile, PTC's Pro/ENGINEER uses the .1 file extension as a backup file. Pro/ENGINEER is an integrated 3D CAD/CAM/CAE modeling software package that is used primarily for mechanical engineering, design and manufacturing. A number of companies within the aerospace, defense, automotive, industrial and medical industries use this program to create complete 3D digital models of their products.
The archiving and compression utility "StuffIt" uses the .1 file extension format as an archive file, usually whenever a single file is split off into a number of portions of various sizes ranging from 1.44MB to 700MB or more. StuffIt was primarily used on the Apple Mac OS operating system as the standard file archiving and compression utility, although it is also available on the Windows operating system as well. The extension is also used by America Online's AIM AOL Instant Messenger program. The files are normally unseen and the file extension itself can range in number from .1 to .999. These files are generally harmless and don't carry a risk of being infected by viruses, although users still have to exercise caution when dealing with them.
Mozilla uses the .1 file extension for Firefox web browser's cookie, image and popup permissions. These files are normally located deep within the installation folder's hierarchy. Since the cookie, image and popup permissions can be modified via the web browser, there is no need to directly access these files. In the event that these files are infected with a virus, running an anti-virus utility will usually solve most problems.