| 501 | BEFLIX | |
| 502 | NewtonScript | |
| 503 | WATFIV | |
| 504 | Lustre (programming language) | |
| 505 | Lucid (programming language) | |
| 506 | CLIST | |
| 507 | CORAL | |
| 508 | Amiga Basic | |
| 509 | Z-level programming language | |
| 510 | TTCN-3 | |
| 511 | Nial | |
| 512 | CMU Common Lisp | |
| 513 | Raptor (programming language) | |
| 514 | IBM PL/S | |
| 515 | TI BASIC (TI 99/4A) | |
| 516 | OpenROAD | |
| 517 | Axum (programming language) | |
| 518 | Z++ | |
| 519 | Refal | |
| 520 | TTCN | |
| 521 | Gforth | |
| 522 | Caché ObjectScript | |
| 523 | Charm++ | |
| 524 | Chez Scheme | |
| 525 | RTML | |
| 526 | Kawa (Scheme implementation) | |
| 527 | ADMB | |
| 528 | MAD (programming language) | |
| 529 | Scriptlet | |
| 530 | Harbour (programming language) | |
| 531 | LispWorks | |
| 532 | UCBLogo | |
| 533 | OASIS TOSCA | |
| 534 | Bluespec | |
| 535 | XPL | |
| 536 | FXML | |
| 537 | Nu (programming language) | |
| 538 | DYNAMO (programming language) | |
| 539 | Reason (programming language) | |
| 540 | AtScript | |
| 541 | Enterprise Mashup Markup Language | |
| 542 | Flavors (programming language) | |
| 543 | Haskell features | |
| 544 | High Performance Fortran | |
| 545 | SISAL | |
| 546 | BETA (programming language) | |
| 547 | Hamilton C shell | |
| 548 | Qalb (programming language) | |
| 549 | Pyomo | |
| 550 | Ring (programming language) | |
| 551 | Chinese BASIC | |
| 552 | PicoLisp | |
| 553 | T (programming language) | |
| 554 | POP-11 | |
| 555 | Script.NET | |
| 556 | STELLA (programming language) | |
| 557 | Rocky Mountain BASIC | |
| 558 | Unicon (programming language) | |
| 559 | Microsoft Visual Programming Language | |
| 560 | Sather | |
| 561 | GNU Common Lisp | |
| 562 | LiveScript (programming language) | |
| 563 | MIT/GNU Scheme | |
| 564 | NewLISP | |
| 565 | Standard ML of New Jersey | |
| 566 | Business Intelligence Markup Language | |
| 567 | EasyLanguage | |
| 568 | IBM RPG II | |
| 569 | Parser (programming language) | |
| 570 | OpenModelica | |
| 571 | PLEX (programming language) | |
| 572 | Impromptu (programming environment) | |
| 573 | ISLISP | |
| 574 | Newspeak (programming language) | |
| 575 | Franz Lisp | |
| 576 | XBasic | |
| 577 | Swift (parallel scripting language) | |
| 578 | Gödel (programming language) | |
| 579 | CMS-2 | |
| 580 | CMS Pipelines | |
| 581 | ColorForth | |
| 582 | Flowcode | |
| 583 | Protel | |
| 584 | Object REXX | |
| 585 | TUTOR | |
| 586 | STOS BASIC | |
| 587 | PowerHouse (programming language) | |
| 588 | Superbase (database) | |
| 589 | Programming Language for Business | |
| 590 | Casio BASIC | |
| 591 | Handel-C | |
| 592 | Keykit | |
| 593 | Mondrian (software) | |
| 594 | Ballerina (programming language) | |
| 595 | Nomad software | |
| 596 | Newsqueak | |
| 597 | Visual Objects | |
| 598 | WQL | |
| 599 | R++ | |
| 600 | Altera Hardware Description Language | |
