In Emacs M-x slime will start slime with the default (first) Common Lisp implementation. If there are multiple implementations provided (via variable slime-lisp-implementations), other implementations can be accessed via M-- M-x slime, which will offer the choice of available implementations in mini-buffer.
M-x slime will open REPL buffer which will look as follows:
; SLIME 2016-04-19
CL-USER>
SLIME REPL buffer accepts a few special commands. All of them start with ,. Once , is typed, the list of options will be shown in mini-buffer. They include:
,quit,restart-inferior-lisp,pwd - prints current directory from where Lisp is running,cd - will change current directory