We report measurements of inclusive particle production at large angles in proton‐proton collisions at the CERN Intersecting Storage Rings (ISR).Three different sets of results are presented: 1. Data on the inclusive production of &pgr;±, K±, p, andp, at low transverse momenta over an angular range of 29° to 90° in the centre‐of‐mass system and for centre‐of‐mass energies&sqrt;s = 31 and 53 GeV. 2. Results from a search for massive particles at 62.5° in the laboratory,&sqrt;s = 53GeV‐‐ in particular, cross‐sections for the production of deuterons and antideuterons are given. 3. Data on inclusive charged particle production (no particle identification) of high transverse momentum pTbetween 1.5 and 4.4 GeV/c, at centre‐of‐mass angles 59.4° and 90°,&sqrt;s = 44 and 53 GeV. In addition, preliminary measurements have been made at&sqrt;s = 31 and 44 GeVof &pgr;±, K±, p, andpproduction ratios at 90° for pTbetween 2.0 and 3.5 GeV/c. The (K++ p)/&pgr; ratio is given down topT = 1.4 GeV/c.