when was Rapid PVST+ introduced

[Garegin88]

I googled this and no answer. What year was it introduced? 

https://www.ciscopress.com/articles/article.asp?p=2832407&seqNum=5

[balaji.bandi]

as i remember i think 2006 or later days i have  start configuring on cisco switches.(i guess)

by having said " what is the use case here for you to know the year ?" 

[Garegin88]

"by having said " what is the use case here for you to know the year ?"

just curious if it came out before or after MSTP

[Martin L]

Around 2004/5 - I think -as I have old switching book from that era that has STP, RSTP and MST;

STP came before Rapid STP and then MSTP (or MST) includes RSTP; in fact Cisco implementation Of MST includes or runs on Rapid STP processes.  see following explanation

MST in this release is based on the draft version of the IEEE standard. 802.1s for MST is an amendment to 802.1Q. MST extends the IEEE 802.1w rapid spanning tree (RST) algorithm to multiple spanning trees. This extension provides both rapid convergence and load balancing in a VLAN environment. MST converges faster than PVST+. MST is backward compatible with 802.1D STP, 802.1w (rapid spanning tree protocol [RSTP]), and the Cisco PVST+ architecture.   

this book from 2005 has STP https://www.ciscopress.com/store/campus-network-design-fundamentals-9781587052828

Regards, ML
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[Garegin88]

I finally found it! It was in Dec 2002

Release Notes for Catalyst 6000/6500 Software Release 7.x (archive.org)