Adverb
In an optional manner.
Source: Webster's dictionarythis rule is applied optionally Source: Internet
A bitwise operation optionally process bits one at a time. Source: Internet
A block is basically a section of code (zero or more statements) which is delimited by a pair of curly braces and may optionally be labeled. Source: Internet
Added the Metadata Partition facilitating metadata clustering, easier crash recovery and optional duplication of file system information: All metadata like nodes and directory contents are written on a separate partition which can optionally be mirrored. Source: Internet
A Data General SuperNova S/200 minicomputer served as the maintenance control unit (MCU), which was used to feed the Cray Operating System into the system at boot time, to monitor the CPU during use, and optionally as a front-end computer. Source: Internet
Additionally products in this category may optionally contain added vitamin D, calcium or defatted wheat germ, each within specified limits. Source: Internet