Recently Unicode and ISO 10646 have defined 16 supplementary planes, each the same size as the BMP, for future expansion. Some of those planes are being populated already. There are code points defined for additional alphabets and a large number of math characters in the Supplementary Multilingual Plane (SMP). Also a large number of additional ideographic characters have been added to the Supplementary Ideographic Plane (SIP).

In total there are now over one million code points available.