In The Unicode Standard, Kharoshthi script implementation is discussed in Chapter 14 South and Central Asia-III: Ancient Scripts.
The Kharoshthi script was encoded in The Unicode Standard version 4.1. The script is encoded in the following block:
|Blocks||Character Range||Added in Unicode Version||Unicode Chart|
A number of proposals for its inclusion have been submitted to the Unicode Technical Committee and WG2:
2002-11-20 Supplementary Information to Accompany L2/02-203R2, Proposal to Encode Kharoshthi — Rick McGowan ( L2/02-424)
2012-11-03 Sorting all RTL scripts together — Roozbeh Pournader ( L2/12-377)
2017-01-17 Additional Characters for Kharoṣṭhī Script — Andrew Glass, Stefan Baums ( L2/17-012)