The shell bone script of character Manage is
another shell bone script is
The bottom one is character Mouth, no disagreement. What is the top-right? Dictionary of Pictography explains it as a Scepter, a person who holds a scepter to make orders is managing or executing a project, or guiding an army in battle field. But some people believe that it is a tree, big tree, which ancient people thought big tree can get the sky, or god, so order could be considered from the god.
I disagree both explanation. I think the part of the top-right is a Person (Post 37)
which is shell bone script of character Person.
Let see the big seal script of the character Person.
which is similar to the shell bone script of character Manager above except the arm pointing falling down 45 degree, because there is a character Mouth below. The person's arm could point low, or high depending on the situation.
A person who makes orders by mouth for a project, or an army, is managing, or commanding.
The bronze script of the character is
Similar to shell bone script.
The small seal script of the character is
Same as the clerical script.
The pinyin of 司 is Si1.
司 is popular character, widely used in two characters words: 司机 - Driver (manage a car), 司令 - Commander (manage an army), 司仪 - master of a ceremonies, 司库 - Treasurer (manage money).