The very latest in air navigation computers include not only T/S/D and Dead Reckoning calculations, they now incorporate "Universal" features for world-wide use.
Most E6-B computers include the following:

Improved Instructions
The back side of the wind slide features scales for Sectional and
WAC charts and new graphic instructions on how to work the computer.

Formula Boxes
Designed to assist in solving problems. Enter the indicated details
using a pen or pencil - then erase.

Fully Graduated Scales
Wind Slides with speed ring lines representing values of one. This eliminates the need for interpolating between "every other" speed ring and reduces possibility of error.