AU  - CRAWFORD,ROGER
TI  - INFORMATION SYSTEMS AND INFORMATION TECHNOLOGY: GCSE, KEY STAGE 4
SN  - 0582244943
U1  - 004/CRA 
PY  - 1994///
CY  - LONDON
PB  - LONGMAN GROUP LTD.                      
KW  - INFORMATION TECHNOLOGY
KW  - SYSTEMS
KW  - COMMUNICATING INFORMATION
KW  - THE MEMORY
KW  - INPUT/OUTPUT
KW  - SPREADSHEETS
ER  -