Registration vs Log - What's the difference?

As nouns the difference between registration and log

is that registration is the act of signing up or registering for something while log is the trunk of a dead tree, cleared of branches.

to cut trees into logs.

(uncountable) the act of signing up or registering for something

''Complete the registration process

(countable) that which registers or makes something official, e.g. the form or paper that registers

Did you submit your car registration yet?

(uncountable) alignment, e.g. of colors or other elements in a printing process

(uncountable) the location where guests register, especially with a hotel.

The elevators are just past registration .

(music) The art of selecting and combining the stops or registers of an organ.

(Logarithm)

(head)

logarithm

x=b^y

then

\log_{b}(x)=y

* (logarithm) (with base e) ln, lb

If not specified, the assumed base of the logarithm is either 10 or e, depending on context.