exist. The project number 0 is generally reserved for system software, and prior to Version 9 there is only 1 project 0 account (named [0,1]). Programmers in the project number 1 are privileged accounts, equivalent to the single account "root" on Unix systems, except that the account numbers [1,0] through [1,254] are all privileged accounts. As of Version 9, any account can be granted specific privileges by the systems manager. The account [0,1] is used to store the operating system file itself, all run-time library systems, and certain system files relating to booting the system (author's comments appear on the right in bold): DIR [0,1] Name .Ext Size Prot Date SY:[0,1] BADB .SYS 0P < 63> 06-Jun-98 List of bad blocks SATT .SYS 3CP < 63> 06-Jun-98 Bitmap of allocated disk storage INIT .SYS 419P < 40> 06-Jun-98 Operating system loader program ERR .ERR 16CP < 40> 06-Jun-98 System error messages RSTS .SIL 307CP < 60> 06-Jun-98 Operating system itself BASIC .RTS 73CP < 60> 06-Jun-98 BASIC-PLUS run time system RT11 .RTS 20C < 60> 06-Jun-98 RT-11 run time system SWAP .SYS 1024CP < 63> 06-Jun-98 System swap file CRASH .SYS 35CP < 63> 06-Jun-98 System crash dump RSX .RTS 16C < 60> 23-Sep-79 RSX-11 run-time system TECO .RTS 39C < 60> 24-Sep-79 TECO text editor Total of 1952 blocks in 11 files in SY:[0,1] (Editor's note: This directory listing is prior to Version 9.) The DIR command is an installed CCL equivalent to a RUN command for the DIRECT program. [0,1] is the account number (and directory name) of the operating system storage account. It would be referred to as "project number 0, programmer number 1". The numbers shown after each file represent its size in disk blocks, a block being 512 bytes or 1/2 kilobyte (K). "C" indicates the file is contiguous (is stored as one file without being separated into pieces, similar to files on a Microsoft Windows system after a drive has been defragmented), while "P" indicates it is specially protected (cannot be deleted, even by a privileged user, unless the P bit is cleared by separate command). The numbers in brackets (like "< 40>") represent the protections for the file, which is always displayed in decimal. Protections indicate if the file may be seen by any other user, by other users with the same programmer number, if the file is read only or if it