Install a lisp implementation such as [SBCL](http://www.sbcl.org/)
or [CLisp](http://clisp.org/). Both can be installed via Homebrew on
Mac OS X.

```bash
brew install sbcl
# or
brew install clisp
```

(See their homepages for instructions for installing on other
platforms.) 

Then install [QuickLisp](http://www.quicklisp.org/beta/#installation)
and download
[http://beta.quicklisp.org/quicklisp.lisp](http://beta.quicklisp.org/quicklisp.lisp).

```bash
curl -O http://beta.quicklisp.org/quicklisp.lisp
```

Load it into your running Lisp implementation, and type:

```lisp
(quicklisp-quickstart:install)
```

To add the startup code to your init file so that the next time you
start the lisp interpreter QuickLisp will be loaded, type:

```lisp
(ql:add-to-init-file)
```

Optionally load lisp-unit:

```lisp
(ql:quickload "lisp-unit")
```

This will be done the first time you run any exercises tests. But you
can do it now if you want.

Install a lisp implementation such as [SBCL](http://www.sbcl.org/)
or [CLisp](http://clisp.org/). Both can be installed via Homebrew on
Mac OS X.

```bash
brew install sbcl
# or
brew install clisp
```

See their homepages for instructions for installing on other
platforms.

We will use [QuickLisp] for package management. To install QuickLisp, first download quicklisp.lisp: 

```bash
curl -O http://beta.quicklisp.org/quicklisp.lisp
```

Then load it into your running Lisp implementation, e.g. using ```(load "quicklisp.lisp")``` in clisp. To complete the installation type:

```lisp
(quicklisp-quickstart:install)
```

Read more details about installing QuickLisp [here](http://www.quicklisp.org/beta/#installation).

To add the startup code to your init file so that the next time you
start the lisp interpreter QuickLisp will be loaded, type:

```lisp
(ql:add-to-init-file)
```

Optionally load lisp-unit:

```lisp
(ql:quickload "lisp-unit")
```

This will be done the first time you run any exercises tests. But you
can do it now if you want.

Clarify how to install QuickLisp
Clarify how to install QuickLisp