Original sentence: POSC Caesar also became member of the virtual organization EPISTLE (European Process Industries STEP Technical Liaison Executive) where it started to collaborate with PISTEP (UK), and USPI-NL (Netherlands) on the development of ISO 10303, also known as "STEP" or "Standard for the Exchange of Product model data"
Edited sentence: During that time, POSC Caesar also became member of the virtual organization EPISTLE (European Process Industries STEP Technical Liaison Executive) where it started to collaborate with PISTEP (UK), and USPI-NL (Netherlands) on the development of ISO 10303, also known as "STEP" or "Standard for the Exchange of Product model data"