SQL "OR" Problem

hi all,

i'm trying to populate a list box with the names of
employees linked to certain positions (each name
listed once)...

SELECT DISTINCT t_emp.emp_id, t_emp.first_name || ' '
|| t_emp.last_name, t_pos.pos

FROM t_inspect, t_emp, t_pos
WHERE t_emp.pos_id = t_pos.pos_id
AND t_inspect.inspect_emp_id = t_emp.emp_id
AND t_pos.pos = 'Assembler'
OR t_pos.pos = 'Quality Inspector'
OR t_pos.pos = 'Test Technician'

i get the following results:

1. if an employee is an Assembler then s/he is listed
3 times - once with each position "pos".

2. if an employee is a Qaulity Inspector then s/he is
listed 2 times - once with each position "pos"
exlcuding "Assembler".

1. if an employee is a Test Technician then s/he will
likely be listed once with "Test Technician". i don't
have a Test Technician in my dev db.

i'm not sure if the OR keyword is supported or if i
just made it up. again, i'm just trying to list each
name once in each of these three positions (a name can
only be in one position category).

i think i'm either abusing "OR", missing something in
my where clause or, most probably, both.

any help would be appreciated.

tia...

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