[!lemma=□] □
[!lemma=hardware] □
[!lemma="front-ends"] □
However , other front-ends ( besides merchant servers ) and possibly a merchant server may allow order status checks on back-end orders . This section provides further information on Intelligent RF Front-Ends ( Digital Control of Analog Circuits ) , the submission , evaluation , and funding processes , proposal and proposal abstract formats , and other general information . The Intelligent RF Front-Ends ( IRFFE ) program is developing microsystems that self-adapt to changing operating and internal conditions enabling wideband radio-frequency receivers and transmitters to automatically compensate for performance variations through a broad range of operating conditions . " This is the traditional domain of an embedded or proprietary database in manufacturing front-ends ( job-floor control ) . The system eases the construction of front-ends ( i.e ., lexical and syntactical analyzers ) , but beyond that provides substantial support for complex semantic analysis and transformation phases in which abstract syntax tree-like intermediate representation ( IR ) data structures are manipulated .