The syllabus for the Data Entry Operator (DEO) in the Central Bureau of Investigation (CBI) post is as follows:

1. General Intelligence:
- Analogies
- Similarities and differences
- Space visualization
- Spatial orientation
- Problem-solving
- Analysis
- Judgment
- Decision making
- Visual memory
- Discrimination
- Observation
- Relationship concepts
- Arithmetical reasoning and figural classification
- Arithmetic number series
- Non-verbal series
- Coding and decoding
- Statement conclusion
- Syllogistic reasoning etc.

2. English Language:
- Spot the error
- Fill in the blanks
- Synonyms/Homonyms
- Antonyms
- Spellings/detecting mis-spelt words
- Idioms & phrases
- One-word substitution
- Improvement of sentences
- Active/passive voice of verbs
- Conversion into direct/indirect narration
- Shuffling of sentence parts
- Shuffling of sentences in a passage
- Cloze passage & comprehension passage.

3. Quantitative Aptitude:
- Arithmetic
- Number Systems
- Computation of Whole Numbers
- Decimals and Fractions
- Relationship between numbers
- Fundamental arithmetical operations
- Percentages
- Ratio and Proportion
- Averages
- Interest
- Profit and Loss
- Discount
- Use of Tables and Graphs
- Mensuration
- Time and Distance
- Ratio and Time
- Time and Work etc.

4. General Awareness:
- Current events
- Sports
- History
- Culture
- Geography
- Economic scene
- General Polity including Indian Constitution
- Scientific Research etc.

5. Basic Computer Knowledge:
- Basics of computers
- Computer hardware and software
- Operating system
- MS Word, MS Excel, MS PowerPoint
- Generation of computers
- Internet
- Email
- Web browser
- Social media
- Computer abbreviations

Conclusion:
The SSC CHSL Exam syllabus for the Data Entry Operator (DEO) in the Central Bureau of Investigation (CBI) post includes subjects like General Intelligence, English Language, Quantitative Aptitude, General Awareness, and Basic Computer Knowledge. It is important for candidates to thoroughly prepare and understand these topics in order to perform well in the examination.