19XX 


$K$theory [See also 16E20, 18F25] 

19Bxx 

Whitehead groups and $K_1$ 


19B10 
Stable range conditions 


19B14 
Stability for linear groups 


19B28 
$K_1$ of group rings and orders [See also 57Q10] 


19B37 
Congruence subgroup problems [See also 20H05] 


19B99 
None of the above, but in this section 