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A hand held mobile telephone (1) is disclosed comprising a front face (3) having a longitudinal extension greater than a lateral extension and having a plurality of openings therein, and a multiplicity of keys (7-13) each having an upper surface bounded by side walls. Each key (7-13) protrudes from

A hand held mobile telephone (1) is disclosed comprising a front face (3) having a longitudinal extension greater than a lateral extension and having a plurality of openings therein, and a multiplicity of keys (7-13) each having an upper surface bounded by side walls. Each key (7-13) protrudes from one of the plurality of openings to provide its upper surface for tactile actuation by a user and a plurality of said multiplicity of keys are arranged along a common first axis, in the longitudinal direction. Further, at least one of said plurality of keys has a vertex, in the boundary of its upper surface, aligned on said first axis.

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What is claimed is: 1. A hand held mobile telephone comprising: a front face having a longitudinal extension greater than a lateral extension; and having a plurality of openings therein; and a multiplicity of keys each of which protrudes from an opening and presents a front surface, bounded at its

What is claimed is: 1. A hand held mobile telephone comprising: a front face having a longitudinal extension greater than a lateral extension; and having a plurality of openings therein; and a multiplicity of keys each of which protrudes from an opening and presents a front surface, bounded at its periphery by side walls, for actuation by a user, wherein a plurality of said multiplicity of keys are arranged along a common first axis, in the longitudinal direction, characterised in that at least a portion of at least one of said plurality of keys has a substantially V-shaped peripheral boundary wherein the V-shaped peripheral boundary is defined by corresponding vertices including a first vertex aligned on the first axis and a second corresponding vertex aligned with the first vertex and the first axis. 2. A hand held mobile telephone as claimed in claim 1 wherein the vertex in the boundary of the at least one of said keys is obtuse. 3. A hand held mobile telephone as claimed in claim 1 wherein the at least one of said keys has a boundary with a substantially V shaped portion along one side. 4. A hand held mobile telephone as claimed in claim 1, wherein the at least one of said keys has a substantially V shaped boundary, with a first vertex in one side and a second vertex in another side, said first and second vertexes being aligned with the first axis. 5. A hand held mobile telephone as claimed in claim 1 wherein each one of said plurality of keys has a vertex, in the boundary of its front surface, aligned on said first axis. 6. A hand held mobile telephone as claimed in claim 1 wherein each of said plurality of keys is identically shaped. 7. A hand held mobile telephone as claimed in claim 1 wherein said first axis bisects the width of the front face. 8. A handheld mobile telephone as claimed in claim 1 wherein said first axis is an axis of reflection symmetry, for each of said plurality of keys. 9. A hand held mobile telephone as claimed in claim 1, wherein said multiplicity of keys are arranged in rows extending laterally and columns extending longitudinally, wherein each row comprises keys including a central key, a left edge key to the left of the central key and a right edge key to the right of the central key, wherein the central key is one of said plurality of keys. 10. A handheld mobile telephone as claimed in claim 9, wherein each of the keys in a row is contiguous. 11. A handheld mobile telephone as claimed in claim 10, wherein the contiguous keys protrude through a single opening in the front face. 12. A handheld mobile telephone as claimed in claim 9, wherein the single opening is an opening in a front face element providing the front face. 13. A handheld mobile telephone as claimed in claim 12, wherein each of the keys in a row is contiguous, the keys of a row form, in combination, a V-shape and the contiguous keys protrude through a single V-shaped opening in the front face. 14. A handheld mobile telephone as claimed in claim 9, wherein the contiguous keys in a row are contiguous and extend right across the front face, from one side of the front face to the other. 15. A handheld mobile telephone as claimed in claim 9, wherein each left edge key has a vertex in the boundary of its front surface aligned with a second longitudinal axis, parallel to the first longitudinal axis. 16. A handheld mobile telephone as claimed in claim 15, wherein each left edge key has a boundary to its front surface having an inverted V shape. 17. A handheld mobile telephone as claimed in claim 15 wherein each left edge key is identically shaped, but differently shaped to each central key. 18. A handheld mobile telephone as claimed in claim 9, wherein each right edge key has a vertex in the boundary of its front surface aligned with a third longitudinal axis, parallel to the first longitudinal axis. 19. A handheld mobile telephone as claimed in claim 18, wherein each right edge key has a boundary to its front surface having an inverted V shape. 20. A handheld mobile telephone as claimed in claim 18 wherein each right edge key is identically shaped, but differently shaped to each central key and each left key. 21. A handheld mobile telephone as claimed in claim 9, wherein said multiplicity of keys are arranged in a three by four array, wherein each row has three contiguous keys protruding through a single opening extending laterally across the width of the front face. 22. A handheld mobile telephone as claimed in claim 21 wherein the single opening is an opening in a front face element providing the front face. 23. A handheld mobile telephone as claimed in claim 1 wherein said first axis is an axis of reflection symmetry for the multiplicity of keys. 24. A handheld mobile telephone as claimed in claim 11 wherein the single opening is an opening in a front face element providing the front face. 25. A hand held mobile telephone comprising: a front face having a longitudinal extension greater than a lateral extension and having a plurality of openings therein; and a multiplicity of keys each of which protrudes from an opening and presents a front surface, bounded at its periphery by side walls, for actuation by a user, wherein a plurality of said multiplicity of keys are arranged along a common first axis, in the longitudinal direction, characterised in that at least one of said plurality of keys has a first vertex, in its peripheral boundary, aligned on said first axis and a second vertex aligned with the first vertex and the first axis, wherein one of the vertices provides one-fold rotational symmetry of said at least one of said plurality of keys, so that a user can determine a preferred orientation of the telephone by tactile sensation of that vertex of the at least one of said plurality of keys. 26. A hand held mobile telephone comprising: a front face having a longitudinal extension greater than a lateral extension; and a multiplicity of keys each having a front surface, bounded by side walls, wherein each key provides its front surface for tactile actuation by a user, wherein a plurality of said multiplicity of keys are arranged along a common first axis, in the longitudinal direction, characterised in that at least one of said plurality of keys has a vertex, in the boundary of its front surface, aligned on said first axis wherein the at least one of said keys has a boundary with a substantially V shaped portion along one side. 27. A hand held mobile telephone comprising: a front face having a longitudinal extension greater than a lateral extension; and a multiplicity of keys each having a front surface, bounded by side walls, wherein each key provides its front surface for tactile actuation by a user, wherein a plurality of said multiplicity of keys are arranged along a common first axis, in the longitudinal direction, characterised in that at least one of said plurality of keys has a vertex, in the boundary of its front surface, aligned on said first axis wherein the at least one of said keys has a substantially V shaped boundary, with a first vertex in one side and a second vertex in another side, said first and second vertexes being aligned with the first axis. 28. A hand held mobile telephone comprising: a front face having a longitudinal extension greater than a lateral extension; and a multiplicity of keys each having a front surface, bounded by side walls, wherein each key provides its front surface for tactile actuation by a user, wherein a plurality of said multiplicity of keys are arranged along a common first axis, in the longitudinal direction, characterised in that at least one of said plurality of keys has a vertex, in the boundary of its front surface, aligned on said first axis wherein the said multiplicity of keys are arranged in rows extending laterally and columns extending longitudinally, wherein each row comprises keys including a central key, left edge key to the left of the central key and a right edge key to the right of the central key, wherein the central key is one of said plurality of keys.