Finder 7.0 To 9.2
In 1991 Apple released System 7, a significant rewrite of their operating system. Like every other component of the OS, the Finder received a major overhaul and it was completely rewritten using the C++ programming language. MultiFinder was now always active. Finder windows were colorized, and the list view was expanded to include "disclosure triangles" which allowed the user to drill down further into the file system without opening more windows. The Finder's trash icon took on a more refined appearance, and the Color feature in System 6 (on color Macintoshes only), which allowed the user to assign a color shade to files, was extended to let users assign a label. These labels had a user-definable name and color. The Finder's new search function could also locate files based on their labels. The trash folder was at last a "real" folder, meaning it wasn't emptied after each restart.
Finder 7.0 unveiled an "alias" functionality which allowed files to be represented in multiple locations by simple pointer files. Starting in System 7, the Put Away command could also be used as an alternate means to unmount floppy disks and CD-ROMs. It differed from the Eject command in that it didn't leave a 'ghost icon' on the desktop. This icon was intended to facilitate copying floppy disks on single-drive machines but the capability was seldom used with the advent of hard drives and was later removed. Though the Macintosh System itself would undergo major changes in the intervening years, the Finder remained relatively unchanged until the release of Mac OS 8 in 1997.
Read more about this topic: Finder (software)