Hi, I need to sign a Non-Disclosure Agreement
and need to know what some fields mean. Here is the signature part of it:

In witness whereof the parties have executed this agreement as of the date first written above.

XXX (company name)...........The Receiving Party
By:________________ .........By:_________________
Name & Title:________.........Name & Title:_______________
Date:_______________.........Date:________________ _____
I have found on the internet that the "By:" field should be my name but before it there is "/s/".
What does the /s/ mean ?
Thanks