Executable files used the relocatable .CMD file format. MS-DOS version 1.0 added a more advanced relocatable .EXE executable file format. The "R" type found some use for relocatable binary executable files. Relocatable partitions are able to be "compacted" to provide larger chunks of contiguous physical memory. For relocatable symbols, some relocation information must be stored. Relocatable elements are the output of basic mode compilers. Two object code loaders for loading absolute or relocatable object code. Installations could define additional "private" relocatable and source statement libraries on other disk volumes. Labels can also be used to initialize constants and variables with relocatable addresses. So early versions of Unix used the relocatable memory reference model. Capistrano Valley has 180, in permanent buildings and 19, in relocatable buildings. The school has 63 classrooms and six relocatable classrooms. For compatibility with earlier (basic mode) programming models, there are relocatable and absolute element types. In addition, fixed installation and relocatable urinals are available for use by girls and women. Expressions can be "absolute", "relocatable", or "complex relocatable".