Silent Service uses the below ship ID from the manual for a format of copy protection.
When you start a mission you are given this screen to ID the ship:

Red Storm Rising used a manual look up for it’s copy protection.

You are presented with a WARSHIP Identification test screen as shown in the second images.

Thanks to Craig Ernster we now have the Warships in a PDF file.

You can DOWNLOAD IT HERE:
Red Storm Rising Ship ID Chart

F-14 Tomcat used manual copy protection.

As the game loads it stops at the screen below and you must identify parts of the F-14.

But, If you incorrectly identify the highlighted item, you’ll be quickly enlisted and just as quickly discharged for conduct unbecoming an officer.

Now see the print out below to know how to identify the correct parts to start the game.

GUNSHIP by Microprose, not only used Rapidlok protection BUT ALSO a manual check.

You must identify a tank/vehicle to continue the game. These are in the original manual, so I put this PDF together incase you do not have the original manual.

DOWNLOAD HERE:Gunship-TANKS-ID

Battles of Napoleon will ask you for a code word directly after the title screen.

I made this list from the HEX data in the program.

Download this PDF: Battles of Napoleon Codes

Heroes of the Lance – Copy Protection Codes

This game by SSI used a manual lookup code at the start as it’s form of copy protection.

Here is a quick sheet I made in case you do not have the original manual: