Why information processing matters
Data are raw facts: numbers, words, sounds, pictures. Information is data that have been organised so they have meaning and help a decision.
Information processing follows a cycle: collect (input) → store → process (sort, calculate, compare) → output (report, chart) → share and use.
Companies depend on it every day: counting stock, paying salaries, sending bills, finding which product sells, planning next year. Computers make this fast, exact and cheap. Wrong data in gives wrong information out, so check data first.
Communication and information design
Information is useful only when the other person understands it. Communication needs a sender, a message, a medium and a receiver, and feedback to check it was understood.
Information design means shaping the message so it is easy to read:
- One main message per page or chart.
- Choose the right form: a table for exact numbers, a bar chart to compare, a line chart for change over time.
- Clear titles, labels and units. Few colours. Large readable text.
- Remove clutter. Do not start a bar axis in a way that tricks the eye.
- Think of the reader: a manager wants a summary, an accountant wants detail.
Information ethics
Information ethics is the rule of right behaviour with information.
- Privacy: personal data (name, phone, marks, health) needs permission to collect, use and share.
- Truth: never invent or change facts or charts to mislead.
- Ownership: respect copyright; give credit; do not copy others' work as yours.
- Care: keep passwords secret, do not spread false news, be kind online.
Many countries also have laws on data protection, so a company must follow both ethics and law.
Try it: a class survey
Ask 10 friends their favourite game. Write the answers (data). Make tally marks and counts (process). Draw a small bar chart with a title and labels (output). Before you show it, ask yourself: did I use anyone's name without asking?
Key formulas and definitions
- Information = data + processing + meaning
- Cycle: collect, store, process, output, share
- Good design = one message + right chart + clear labels
- Ethics: privacy, truth, ownership, care
Worked examples
1. A shop has a notebook with 200 bill amounts. Is this data or information? What turns it into information?
It is data. Adding totals by day or by item, then showing the result clearly, turns it into information.
2. Which chart suits "monthly sales for 12 months": a pie chart, a bar chart or a line chart? Why?
A line chart. It shows change over time and makes rises and falls easy to see.
3. A manager shows a chart where the bars start at 90 instead of 0 so a small gap looks huge. What is wrong?
It breaks the truth rule of information ethics and design. The chart misleads. Start bars at 0 or mark the break clearly.
4. A company wants to use customers' phone numbers for adverts. What should it do first?
Ask for permission, tell customers why, and follow the data protection law. Without consent, using the numbers is a privacy breach.
Common mistakes
- Treating data and information as the same. Raw data need processing and meaning.
- Believing the computer output is always right. Wrong input gives wrong output.
- Putting too many colours, words or charts on one page.
- Sharing someone's personal data because it is easy to copy.