"FreeBSD 2.1.7 can be installed in 4MB RAM."

That's nice, but we no longer care.

en_US.ISO8859-1/books/faq/book.sgml

@@ -1269,22 +1269,21 @@ File: +DESC (ignored)</screen>
         </question>
 
         <answer>
-          <para>FreeBSD 2.1.7 was the last version of FreeBSD that
+          <para>Installing &os; 4.X requires at least 5MB RAM, and
-            could be installed on a 4MB system.  FreeBSD 2.2 and later
+            installing &os; 5.X and later requires at least
-            needs at least 5MB, and &os; 5.X and later need at least 8MB to
+            8MB.</para>
-            install on a new system.</para>
 
           <para>All versions of FreeBSD prior to 5.X will <emphasis>run</emphasis>
             in 4MB of RAM, they just cannot run the installation
             program in 4MB. You can add extra memory for the install
-            process, if you like, and then after the system is up and
+            process, and then revert to 4MB after the system is
-            running, go back to 4MB. Or you could swap your disk into
+            running. Or you could move your disk into
-            a system which has &gt;4MB, install onto the disk and then
+            a system which has sufficient memory, install onto the disk and then
             swap it back.</para>
 
-          <para>After the installation, if you build a custom kernel,
+          <para>You must build a custom kernel to run in 4MB.  Someone
-            it will run in 4 MB. Someone has even successfully booted
+            has even successfully booted &os; with 2 MB RAM, although
-            with 2 MB, although the system was almost unusable.</para>
+            the system was almost unusable.</para>
         </answer>
       </qandaentry>