+To check out Factor:
+
+* git clone https://github.com/factor/factor.git
+* `cd factor`
+
+To build the latest complete Factor system from git, either use the
+build script:
+
+* Unix: `./build.sh update`
+* Windows: `build.cmd`
+* M1 macOS: `arch -x86_64 ./build.sh update`
+
+or download the correct boot image for your system from
+https://downloads.factorcode.org/images/master/, put it in the `factor`
+directory and run:
+
+* Unix: `make` and then `./factor -i=boot.unix-x86.64.image`
+* Windows: `nmake /f Nmakefile x86-64` and then `factor.com -i=boot.windows-x86.64.image`
+
+Now you should have a complete Factor system ready to run.
+
+Factor does not yet work on arm64 cpus. There is an arm64 assembler
+in `cpu.arm.64.assembler` and we are working on a port and also looking for
+contributors.
+
+More information on [building factor](https://concatenative.org/wiki/view/Factor/Building%20Factor)
+and [system requirements](https://concatenative.org/wiki/view/Factor/Requirements).
+
+### To run a Factor binary:
+
+You can download a Factor binary from the grid on [https://factorcode.org](https://factorcode.org).
+The nightly builds are usually a better experience than the point releases.