CS - Applications

# Applications

Week 10

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## Review

![](https://media0.giphy.com/media/v1.Y2lkPTc5MGI3NjExYzBwZGN3cTZpMWt3czd2NDN6ejVsb2Q3enhieGp1bGJ6cGk1OWppYiZlcD12MV9naWZzX3NlYXJjaCZjdD1n/n4A8i9oVJDIOY/200.webp)

### All Files Are Just What?

Binary

### How Many Bits in a Byte?

8

### How Many Bytes in a Gigabyte?

1,000,000,000

### What is a File Path?

All folders plus a file name.

`C:\Users\Rylan\notes.txt`

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## Common File Extensions

![](https://media3.giphy.com/media/v1.Y2lkPTc5MGI3NjExdmlmMXJkZDA5a21sMW50bHc1aHF1Z3Q1OTEwMm5mamltYmh6MjJyZyZlcD12MV9naWZzX3NlYXJjaCZjdD1n/XcLNPfMKBaCpsD3MoA/200.webp)

### Text Files

- `.txt`
- `.md`

### Rich Documents

- `.odt`
- `.docx`
- `.pdf`

### Code

- `.py`
- `.cpp`
- `.sh`
- `.bat`

### Spreadsheets

- `.csv`
- `.tsv`
- `.xlsx` / `.xls`

### Images

- `.png`
- `.jpg` / `.jpeg`
- `.gif`
- `.svg`

### Executable Files

- `.bin`
- `.exe` / `.osx`
- `.apk` / `.ipa`

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## Applications

![](https://media2.giphy.com/media/v1.Y2lkPTc5MGI3NjExNWFyd2J0ZTF2M2kyczE1Y2E4dnR4ZjF6dHU2bGR4Mmd1ZmFtbGd3NiZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/mAIFDNLtw7HV2N4mhZ/giphy.webp)

### An App is Just a File

- Stored in "raw binary"
- Only viewable in _hex editor_
- Should not be edited

### Program Files (Windows)

- `C:\Program Files`
- `C:\Program Files (x86)`
- `C:\Users\Rylan`

NOTES:
- 64-bit applications
- 32-bit applications
- Only available to one user

### Can Be Anywhere!

- `C:\Users\Rylan\Documents\Games`

### Does File Name Matter?

No!\*

\*Hidden files, extension association, security...

NOTES:
- Be **very careful**; NEVER download/run files you don't trust
- Windows security feature are getting better, you often have to override security settings to run un-certified apps

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## Web Apps

![](https://media2.giphy.com/media/v1.Y2lkPTc5MGI3NjExNHkwa2dvb21paHN1aHJibzZ2MzlmbGJjcmRxenB4ampiamNhamdjNyZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/xT0Gqn9yuw8hnPGn5K/giphy.webp)

### What is a Web App?

An **application** that runs on **website**.

### Where Are They Installed?

In the cloud (not your computer)

NOTES:
- Requires a _browser_
- Requires an _internet connection_\*

### Examples

- Gmail 
- ThinkWave

NOTES:
- Single-page applications (SPA's) do not refresh browser page while operating
- Multi-page applications (MPA's) do

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## Review

![](https://media4.giphy.com/media/v1.Y2lkPTc5MGI3NjExNWQycjg1aTdtaGtsOGs4am00ZWIwZmpkcmhlNGY5MzI0eG41eTU2biZlcD12MV9naWZzX3NlYXJjaCZjdD1n/3H4YmeYZ6sx3rbvO9r/100.webp)

### What is a File Extension?

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## Now for Some Coding...

[Python: Pandas Module](/2024/fall/computer-science/slides/python-pandas)