As I've not been at HP for almost 11 years Stefek was no longer part of my work life, nor had I been able to keep up with him socially. But once he, his wife and children were a big part of my life; and my heart goes out to those he has left behind - I weep with you Christina, Helena and Paul.
I'll remember Stefek as the Polish boyscout who never grew up; someone who smiled readily and was easy to work with, always ready to lend a hand. He was also very good at his work, a joy to be in the same team with. In 1987 we put together a proposal for a group, KEG, that meant we got to work together for a couple of years - probably the two best years of my working life. Certainly the funniest - his sense of humour was infectious.
I've been unable to excavate any of my own photos of Stefek to add to this post - I'll add one in if / when I find one. Meanwhile there is a great recent photo of him on: Goodbye, Stefek Zaba and the one I've borrowed here is from his home page which is also on his HP Labs Inventor Profile.
Update: His funeral service will be held at Clifton Cathedral on Pembroke Road a week Thursday, 5 April. Time yet to be confirmed. Everyone who knew him is welcome.