You would write brother as bro. But many people think this is a 'slang' word, but it is not, it is an actual short form from brother. Bro is one of the most common ways of saying brother in short form.
You can write 90 in short word form as ninety.
There is no short form to 1942 number. You can write it in words as Nineteen forty two.
you write it like 1k
It is BJS
Tables spoons short is TB
6.02 in short word form is: six and two hundredths.