KDE 1.1.2 was released on 13 September 1999. It was included in Slackware Linux 7.1.
K Desktop Environment 1 on Wikipedia.
No splash screen.
The first time you log in you're informed that the “Desktop”-directory is being created. That's it. No additional configuration or setup required.
Like later KDE versions, the KDE 1 desktop feels a bit like Windows, but interestingly, in this version the task bar (placed on the top of the screen by default) isn't part of the main panel like in later versions. The bottom panel contains the clock, system tray, workspace switcher (with tiny “Logout” and “Lock screen” buttons), and a customizable number of menus and shortcut icons. Everything except for the system tray and clock (which are fixed to the right side of the panel) can be moved around freely. The panel can be hidden to either the left or right side using the arrows in which case icons for the main menu, window list, and disk navigator appear on the left side of the task bar.
Pressing Alt-F2 opens the Run-dialog.
The KDE help system provides access to HTML help files for all KDE programs. It also displays man-pages.
A simple “About KDE” dialog can be accessed from the “Help”-menu of most KDE applications.
Feature: Open with
It's possible to right click on a file to open it with a specific application, however it doesn't seem to be possible to change file associations at all.
The file search application is almost identical to “Find: All Files” in Windows 95.
In wasn't obvious to me at first, but I eventually discovered that the file manager, kfm, was in fact also a web browser (similar to its successor Konqueror).
Even though it's not a KDE application and doesn't use Qt, Netscape also has an icon on the panel by default (and otherwise resides in the “non-KDE Apps”-menu).
KMail has a built-in “Addressbook Manager” but it only contains email addresses:
An actual address book (e.g. name, address, organization, phone etc.) is provided by “kab”, and it's possible to open the KMail Composer directly from kab.
No word processor.
No sound recorder.
No video player.
KDE comes with a control panel called “KDE Control Center” that provides access to all KDE settings dialogs. Each settings dialog can also be opened individually from the KDE main menu (in which case the Control Center sidebar and menubar won't be visible).
The color scheme can be changed similarly to how it's done on Windows 9x. There's also a checkbox that enables/disables Windows 95-style widgets. Another checkbox makes it possible to put the menubar on top of the screen emulating Mac OS.
Themes are collections of color schemes, icons, wallpapers, sounds, window style, etc.
No display settings.
Time and date
No time and date settings.
No accessibility settings.
No power management settings.
No file association settings.
No network settings.
No removable media settings.