sign language
There are no particularly important symbols in Judaism, but the number ' 1 ' is quite significant.
sign and symbols are on pictures
The names of the Judaism symbols are:Mezuzah..Tzitzit & Tallit..Tefillin..Menorah..Yarmulke..Magein David..Chai..Hamesh Hand..
plus sign (+), minus (-), number (#), decimal point for decimals and money, percent (%), dollar sign ($), equal (=)
use the symbols on the sym sign
If symbols do not have an equals then it is an expression.
Use the less than sign and the 3. The less than sign is the comma key plus shift. <3 < 3
Judaism and Catholicism are distinct religions and do not have any symbols that overlap in terms of both aspect and interpretation.
It is a cross sign
sign of the cross
If you mean by sign the religious symbol then the answer is that Islam has no religious symbol in the sense as the cross in C Christianity or David Star in Judaism. The crescent and the star are just political symbols inherited since the Ottoman wars. If you mean by sign the indicators of Islam then the answer is that they are many as the mosques, hijab, the marks on the forehead, ... etc.