The status of equipment and components described in 1-3.A. other than those described in 1-3.A.1.a.3. to 1-3.A.1.a.10. 1-3.A.1.a.12. or 1-3.A.1.a.14. which are specially designed for or which have the same functional characteristics as other equipment is determined by the status of the other equipment. Note 2:
.177 (4.5 mm) . The standard airgun calibre for international target shooting: Note that .22 airgun is not used at all for competitions shot to ISSF standards. Pellet diameter is nominally 4.5 mm with a range of sizes in .01 mm steps to allow exact matching to specific guns for best accuracy.
In 1983 Sony introduced 90 mm micro diskettes better known as 3.5-inch (89 mm) floppy disks which it had developed at a time when there were 4" floppy disks and many variations from different companies to replace the then on-going 5.25" floppy disks. Sony had great success and the format became dominant. 3.5" floppy disks gradually became .