STC PLC <STCL.L> YEAR TO END-1986 Shr profit 15.9p vs 2.25p loss Div 3p making 4.5p vs nil Turnover 1.93 billion stg vs 1.99 billion Pretax profit 134.2 mln vs 11.4 mln loss Tax 47.2 mln vs nil Operating profit 163.0 mln vs 92.7 mln Interest less investment income 13.8 mln vs 37.2 mln Exceptional debit 15.0 mln vs 66.9 mln Minorities 0.3 mln vs 0.4 mln Extraordinary credit 16.4 mln vs 42.0 mln debit Operating profit includes - International computers 90.2 mln vs 61.7 mln Communications systems 56.1 mln vs 48.7 mln Components and distribution 20.0 mln vs 1.5 mln Defence 9.4 mln vs 13.1 mln