A+
                              K
                        AAIMS
                        ADA
                        AIDA
                        ALICE
                        AML
                              AML/E
                              AML/V
                              AML/X
                                    AML/2
                        AML/X
                              AML/2
                        APEX
                        APL\360
                        APL2
                              APLUM
                              APLX
                              LiSEB
                        APLBAGS
                        APLBOL
                        APLG
                        APLGOL
                              APLGOL-2
                        APLOMB
                        APLSF
                        APPLE
                        AQL
                        associons
                        D4
                        DELISA
                        DPL
                              VERS
                                    CLU
                                          Argus
                                               Avalon/C++
                                               Avalon/Common LISP
                                               CSSA
                                               THETA
                                          ASBAL
                                          CAMIL
                                          Capsule
                                          CCLU
                                          Cluster 86
                                          HERAKLIT
                                          Larch/CLU
                                          LIMBO
                                          MODEL
                                          PLAIN
                                          Ruby
                                          Sather
                                               dpSather
                                               pSather
                                               Sather-K
                                          VAL
                                               SAC
                                               SISAL
                                          XE
                                    VERS2
                        FAC
                        Fornax
                        Glee
                        GPL
                        IDAMS
                        IVSYS
                              Abrams APL Machine
                                    MOA
                                    Sharp APL
                                          Dictionary APL
                        J
                              APROL
                        K
                        LOTIS
                        LPG
                        LRLTRAN
                              LLNL-FORTRAN
                              LRL PL/I
                        LYaPAS
                              Lyapas-M
                        MFL
                        microAPL
                        More array theory
                              APL2
                                    APLUM
                                    APLX
                                    LiSEB
                              AT370
                                    APL2
                                          APLUM
                                          APLX
                                          LiSEB
                              Genotype
                              NIAL
                                    Q'NIAL
                        MUMBLE
                        OSU APL
                        PAT
                        Poplar
                        PPL
                        PREDULA
                              Predula Nouveau
                        S
                              R
                              S-Plus
                        SAPL
                        SAX APL
                        Scratchpad
                              REDUCE 2
                                    REDUCE 3
                                          RedTen
                                    REDUCE/17OO
                                          BIL
                              SCRATCHPAD/1
                                    META/LISP
                                    META/PLUS
                                    Scratchpad II
                                          AXIOM
                                               AXIOM 2
                                          MIKE
                        SDL
                              S
                                    R
                                    S-Plus
                        Squigol
                        STSC APL
                              APL*PLUS
                                    APL*PLUS II
                                          APL*PLUS III
                                               APL+
                                    APL*PLUS PC
                                          APL SE
                        TESI
                        Vector PASCAL
                        VSAPL
                              BNA
                        Wyoming structured APL