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By 1973, the File Transfer Protocol (FTP) specification had been defined (RFC 354) and implemented, enabling file transfers over the ARPANET.
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nm(1) [bsd man page]

NM(1)							      General Commands Manual							     NM(1)

NAME
nm - print name list (2BSD) SYNOPSIS
nm [ -gnopru ] [ file ... ] DESCRIPTION
Nm prints the name list (symbol table) of each object file in the argument list. If an argument is an archive, a listing for each object file in the archive will be produced. If no file is given, the symbols in "a.out" are listed. Each symbol name is preceded by its value (blanks if undefined) and one of the letters U (undefined), A (absolute), T (text segment sym- bol), D (data segment symbol), B (bss segment symbol), C (common symbol), or f file name. If the symbol is local (non-external) the type letter is in lower case. If the file is an overlaid executable, the overlay number is printed after the name. The number is printed if the symbol is in an overlay or if it is the entry point (in the base segment) for a subroutine in an overlay. The output is sorted alpha- betically. Options are: -g Print only global (external) symbols. -n Sort numerically rather than alphabetically. -o Prepend file or archive element name to each output line rather than only once. -p Don't sort; print in symbol-table order. -r Sort in reverse order. -u Print only undefined symbols. SEE ALSO
ar(1), ar(5), a.out(5), stab(5) 3rd Berkeley Distribution April 29, 1985 NM(1)

Check Out this Related Man Page

ANM(1)							      General Commands Manual							    ANM(1)

NAME
anm - print name list SYNOPSIS
anm [-gnoprus] file ... OPTIONS
-g Global symbols only -n Sort numerically -o Prepend the filename to each line -p No sorting--use symbol table order -r Sort in reverse order -u List undefined symbols only -s Sort in section order EXAMPLES
anm -gn test.o # Print global symbols in numerical order DESCRIPTION
Anm prints the name list (symbol table) of each ACK format object file in the argument list. If no file name is given, a.out is used. Each symbol name is preceded by its value, a section indicator and a type indicator. The section indicators are: U Undefined symbol A Absolute symbol - Other symbol The type indicators are: F Filename M Module name S Section name E External (global) symbol - Local symbol The output is sorted alphabetically, unless otherwise specified. Notice that anm can only be used on ACK format object files (that is: .o and .out files). If you want to get the name list of an executable program use nm instead. SEE ALSO
asize(1), nm(1), ar(1), size(1). ANM(1)

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