HP Rolls Out New Printers, 3D Scanning, Better Cloud Printing. On Thursday, HP announced 13 new printers and scanners, many of which target the small and midsize business market. This new range of printers and scanners emphasizes Web-connected printing and advanced scanning. HP's TopShot Laserjet Pro M275 can scan 3D objects.
Typically, a single bond is a sigma bond while a multiple bond is composed of one sigma bond together with pi or other bonds. A double bond has one sigma plus one pi bond, and a triple bond has one sigma plus two pi bonds.
By this definition, common forms of sigma bonds are s+s, p z +p z, s+p z and d z2 +d z2 (where z is defined as the axis of the bond). Quantum theory also indicates that molecular orbitals (MO) of identical symmetry actually mix or hybridize.