ID            ! (none),
T=U           ! Replace all T's by U's,                                 :T=U:t=u
A. BBB        ! Replace first word by its first letter plus '.',        :?* *=?1. *2
AA. BBB       ! Replace first word by its first two letters plus '.',   :??* *=?1?2. *2
SHOW a-b      ! Show position 125 - 150,                                |mid(125,150)
HEAD 20       ! Show position 0 - 20,                                   |head(20)
TAIL 20       ! Show 20 last positions,                                 |tail(20)
CNT(A)        ! Count all 'A's,                                         |count(aA)
CNT(ACGT)     ! Count all 'ACGTU',                                      |count("ACGTU")
CNT ambi      ! Count all small letters + ambiguous codes + '.',        |len("-ACGTU")
CNT ambi2     ! Count ambiguous c. + 'acgtu.' in range [100..len-100],  |mid(100,-99)|len("-ACGTU")
G+C           ! G+C content,                                            |count("gcGC");count("agctuAGCTU")|per_cent
CHECKALL      ! Overall Checksum,                                       |checksum
CHECKBAS      ! Checksum (no gaps),                                     |checksum(exclude=.-n;touppper)
DIFFECOLI     ! Difference to ecoli sequence,                           |diff(SAI=ECOLI)
TAXONOMY      ! Taxonomy of species,                                    |taxonomy(1)