 Since codice_5 can be configured (via codice_73) to support command lines up to 1024 characters internally under MS-DOS 7.0 and higher, environment variables should be expected to contain at least 1024 characters as well.In some versions of DR-DOS, the environment passed to drivers, which often do not need their environment after installation, can be shrunken or relocated through codice_74 or codice_75/codice_76 options codice_77 (zero environment), codice_78 (substitute drive, e.g.codice_79) and codice_80 (relocate environment above program) in order to minimize the driver's effectively resulting resident memory footprint.