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The experimental data on multiplicity, correlations, and inclusive spectra of protons, T' mesons, y, neutral strange particles, and fast neutrons produced in the backward (Blab > 90") hemisphere in the laboratory system are presented for p ' ONe interactions and compared with predictions generated by the additive quark model, the Lund model, and the dual parton model. Whereas all these models adequately reproduce the T and y data, only the additive quark model is consistent with the proton data. Strong evidence for the production of backward-emitted isobars is presented and lower limits (corresponding to O;ab>90") are measured to be o ( A + + ) = 6 . 6 k l . 1 mb, o(A0)=8.1*1.0 mb, and o(N*(1440))=3.3+0.6 mb. These backward isobars are responsible for -30% of the backward 7' . The evidence is much weaker for backward [~(~~) = 0 . 8 1 ?~~~ mb] and o0 [u(w0)=0.69?E:$ mb] at 95% C.L. Evidence of correlations between backward, cumulative protons and forward protons is presented. Using these correlations we present evidence for absorption of pions by quasi-two-nucleon systems within the neon nucleus: u ( a + "b'-pp)=18.6*3.0 mb and U ( T + "b"+Ap)=2.7+1.6 mb.PACS number(s): 13.85.Ni, 14.20.Gk, 25.40.Ve

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