1) Bitmaps A bitmap is a rectangular array of bits that correspond to the pixels of a display device.

2) An infinite elastic solid containing a doubly periodic rectangular array of cylindrical inclusions under longitudinal shear is dealt with.

3) The non opposite angle element of two level atom′s reducible density rectangular array through an external controllable driving field is obtained.

4) The non-opposite angle element of two-level atom's reducible density rectangular array is obtained.

5) We study a pair of two-level atoms reducible density rectangular array when atoms by dipole-dipole interaction are put in a thermal reservoir. Decoherence of atoms is analyzed.

6) Each Braille character consists of six or eight movable pins in a rectangular array.