Lukasz, you are right but so is Harman.
The original version of the Small 747 was known as the 747 SP. This was a shortened 747-100, it carried only 230 PAX in a 3 class config and although it offered better performance figures (in both speed and range) that its larger brother it was more costly to run on a per pax basis but offered a better option than running a full size 747-100 at half capacity. This was originally used on short routes until the SR variant apeared later.
For this reason Boeing developed the 747-100 SR mainly for the Japanese market. This version retained the size of the 747-100 and carried up to 563 PAX in the Stretched upper deck or SUD version and offered better performance on short range routes.
After this a 747-300SR was also developed, again at the request of Japanese airlines... There you go a short history of the most well known commercial airliner in the world!
