Abstract: A nematic liquid crystal composition suitable for use as the liquid crystal material of a multiplexed twisted nematic electro-optical display comprising a mixture of Components A, B and C as follows:Component A: a high dielectric anisotropy component;Component B: a low dielectric anisotropy component;Component C: a high cleaning component having a clearing point greater than 80.degree. C.;wherein Component A forms from 25% to 50% inclusive by weight of the composition and consists of one or more two ringed compounds having a terminal cyano group and includes at least one compound having formula I as follows ##STR1## where R.sub.1 is an n-alkyl group having up to 7 carbon atoms and ##STR2## represents a trans-1,4 disubstituted cyclohexane ring; wherein Component B forms from 25% to 50% inclusive by weight of the composition and consists of one or more low dielectric anisotropy compounds, at least 50% of Component B being formed by one or more ester compounds having Formula II as follows: ##STR3## where R.sub.