1. target
   1. 1……
   2. 2……
   3. 3……
2. ELF header -> Elf32_Ehdr
   1. e_ident[EI_NIDENT]
      1. Subtopic 1
   2. e_type
   3. e_machine
   4. e_version
   5. e_entry
   6. e_phoff
      1. program header table's file offset
   7. e_shoff
      1. section header table's file offset
   8. e_flags
   9. e_ehsize
      1. ELF header's size
   10. e_phentsize
       1. one entry of program header's size
   11. e_phnum
       1. number of entries in program header table
   12. e_shentsize
       1. a section header's size, a section header is one entry in the section header table
   13. e_shnum
       1. number of entries in the section header table
   14. e_shstrndx
3. program header table -> array of Elf32_Phdr
   1. p_type
   2. p_offset
   3. p_vaddr
   4. p_paddr
   5. p_filesz
   6. p_memsz
   7. p_flags
   8. p_align
4. Program
   1. advance
   2. character
   3. company
   4. terms
5. Problem
   1. 1……
   2. 2……
   3. 3……
6. Con
   1. 1……
   2. 2……
   3. 3……
7. Essential factor
   1. equipment
   2. material
8. Decision maker
   1. fundamental
   2. minor