diff --git a/.gitignore b/.gitignore
index 9d8e66a..ee0896e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@ do_process.bak2017-11-06_file-test
 2020*
 2021*
 staging
+rust/*/target/*
diff --git a/rust/chug/Cargo.lock b/rust/chug/Cargo.lock
new file mode 100644
index 0000000..8d1d914
--- /dev/null
+++ b/rust/chug/Cargo.lock
@@ -0,0 +1,407 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
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+dependencies = [
+ "winapi",
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+[[package]]
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diff --git a/rust/chug/Cargo.toml b/rust/chug/Cargo.toml
new file mode 100644
index 0000000..a084dd5
--- /dev/null
+++ b/rust/chug/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "chug"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+regex = "1"
+chrono = "0.4"
+itertools = "0.8"
diff --git a/rust/chug/src/main.rs b/rust/chug/src/main.rs
new file mode 100644
index 0000000..68400fc
--- /dev/null
+++ b/rust/chug/src/main.rs
@@ -0,0 +1,158 @@
+use std::env;
+use std::fs;
+use std::io::{BufReader, BufRead, ErrorKind};
+use std::collections::HashMap;
+use regex::Regex;
+use chrono::{Datelike, Duration, offset::Local, NaiveDate, NaiveDateTime, Weekday};
+use itertools::Itertools;
+
+fn main() {
+
+    // Regular Expressions
+    let empty       = Regex::new(r"^\s*$").unwrap();  // regex for finding empty lines (and skipping them)
+    let comment     = Regex::new(r"^\s*#").unwrap();  // regex for finding empty lines (and skipping them)
+    let delim       = Regex::new(r":\s{2}").unwrap(); // regex for splitting timestamp entry
+    let begin       = Regex::new(r"Begin\s+(?P<action>.*)\s*$").unwrap();
+    let end         = Regex::new(r"End\s+(?P<action>.*)\s*$").unwrap();
+    let offset      = Regex::new(r"^[+-]*\d+").unwrap();
+
+    // Process options
+    let params: Vec<String> = env::args().collect();
+
+    // If week offset is provided, grab it
+    let mut week_offset: i64 = 0;
+    for arg in &params {
+        if offset.is_match(&arg.to_string()) {
+            week_offset = arg.parse::<i64>().unwrap();
+        };
+    };
+
+    let day: NaiveDate = last_monday(week_offset);
+    let mut filenames: Vec<String> = Vec::new();
+    for d in 0..7 {
+        filenames.push((day + Duration::days(d)).format("%Y-%m-%d.log").to_string());
+    };
+
+    assert_eq!(filenames.len(), 7);
+
+    let mut grand_total: f64 = 0.0;
+    for filename in filenames {
+        println!("{} ", filename);
+        let mut gtoth: f64 = 0.0;
+        // Process the file
+        match fs::File::open(filename) {
+            Ok(file) => {
+                // Hash Maps (akin to Python Dictionaires)
+                let mut start: HashMap<String, Vec<i64>>  = HashMap::new();
+                let mut finish: HashMap<String, Vec<i64>> = HashMap::new();
+                let reader = BufReader::new(file);
+                // For each line of input (build internal data structures)
+                for line in reader.lines() {
+                    // need to get the string out of line (which is an option enum)
+                    let l: String = line.unwrap();
+
+                    // if the line is empty or is a comment
+                    if empty.is_match(&l) || comment.is_match(&l) {
+                        continue
+                    };
+                    
+                    // Parse the timestamp and entry
+                    let splits: Vec<_> = delim.split(&l.trim_end()).into_iter().collect();
+                    // splits should only ever have two elements (only one delimiter per log line)
+                    let datetime = splits[0];
+                    let entry = splits[1];
+                    let date_time = NaiveDateTime::parse_from_str(datetime,"%Y-%m-%d %H:%M:%S").unwrap();
+                    let timestamp = date_time.timestamp();
+
+                    // Process a Begin
+                    if begin.is_match(&entry) {
+                        let caps = begin.captures(&entry).unwrap();
+                        let action = caps.name("action").unwrap().as_str();
+                        start.entry(action.to_string()).or_insert(Vec::new()).push(timestamp);
+                    };
+
+                    // Process an End
+                    if end.is_match(&entry) {
+                        let caps = end.captures(&entry).unwrap();
+                        let action = caps.name("action").unwrap().as_str();
+                        finish.entry(action.to_string()).or_insert(Vec::new()).push(timestamp);
+                    };
+
+                }; // end for
+
+
+                for (act, tstamps) in start.iter_mut().sorted_by_key(|x| x.0) {
+                    let bc: i64 = tstamps.len().try_into().unwrap();
+                    let ec: i64 = finish.get_mut(&act.to_string())
+                        .expect("Somehow, not a vector!")
+                        .len()
+                        .try_into()
+                        .unwrap();
+
+                    // Debugging
+                    // println!("bc: {}, ec: {}", bc, ec);
+                    // This block ensures the lengths of start and finish for this action are equal
+                    if bc - ec > 1 {
+                        panic!("ERROR:  Missing more than one End");  // need to fix log file
+                    } else if bc > ec {  // bc should be exactly one greater
+                        tstamps.pop();
+                    } else if ec > bc {
+                        panic!("ERROR:  Missing a Begin");  // need to fix log file
+                    };
+
+                    // Debugging
+                    //for t in tstamps.into_iter() {
+                    //    print!("{} ", t);
+                    //};
+                    //println!();
+                    //for t in finish.get_mut(&act.to_string()).expect("Somehow, not a vector!").into_iter() {
+                    //    print!("{} ", t);
+                    //};
+                    //println!();
+
+
+                    let mut delta: i64 = 0;
+                    for i in 0..tstamps.len() {
+                        let beg = tstamps[i];
+                        let en  = finish.get_mut(&act.to_string()).unwrap()[i];
+                        delta += en - beg;
+                    };
+
+                    let d: f64 = nearest(delta as f64 / 3600.00);
+                    if d == 0.0 {
+                        gtoth += 0.08;
+                    } else {
+                        gtoth += d;
+                    };
+                };
+            },
+            Err(error) => match error.kind() {
+                ErrorKind::NotFound => (),
+                _ => panic!("Error reading file! Error:  {}", error)
+            }
+        };
+        // print the output
+        println!("{}", format!("{:.2}", gtoth));
+        println!();
+        grand_total += gtoth;
+    };
+    println!("Grand total: {:.2}", grand_total);
+}
+
+fn nearest(hr: f64) -> f64 {
+   let t = hr * 4.0;
+   t.round() / 4.0
+}
+
+fn last_monday(offset: i64) -> NaiveDate {
+    let day: NaiveDate = Local::today().naive_local() - Duration::days(7 * offset);
+    match day.weekday() {
+        Weekday::Mon => day - Duration::days(0),
+        Weekday::Tue => day - Duration::days(1),
+        Weekday::Wed => day - Duration::days(2),
+        Weekday::Thu => day - Duration::days(3),
+        Weekday::Fri => day - Duration::days(4),
+        Weekday::Sat => day - Duration::days(5),
+        Weekday::Sun => day - Duration::days(6)
+    }
+}
diff --git a/rust/timetracker/Cargo.lock b/rust/timetracker/Cargo.lock
new file mode 100644
index 0000000..16bb4fb
--- /dev/null
+++ b/rust/timetracker/Cargo.lock
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diff --git a/rust/timetracker/Cargo.toml b/rust/timetracker/Cargo.toml
new file mode 100644
index 0000000..40a8538
--- /dev/null
+++ b/rust/timetracker/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "timetracker"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+regex = "1"
+chrono = "0.4"
+itertools = "0.8"
diff --git a/rust/timetracker/src/main.rs b/rust/timetracker/src/main.rs
new file mode 100644
index 0000000..4eed087
--- /dev/null
+++ b/rust/timetracker/src/main.rs
@@ -0,0 +1,179 @@
+use std::env;
+use std::fs;
+use std::io::{self, BufReader, BufRead};
+use std::collections::HashMap;
+use regex::Regex;
+use chrono::NaiveDateTime;
+use itertools::Itertools;
+
+fn main() {
+    // Hash Maps (akin to Python Dictionaires)
+    let mut start: HashMap<String, Vec<i64>>  = HashMap::new();
+    let mut finish: HashMap<String, Vec<i64>> = HashMap::new();
+    let mut ind: HashMap<String, i64>         = HashMap::new();
+
+    // Regular Expressions
+    let empty       = Regex::new(r"^\s*$").unwrap();  // regex for finding empty lines (and skipping them)
+    let comment     = Regex::new(r"^\s*#").unwrap();  // regex for finding empty lines (and skipping them)
+    let delim       = Regex::new(r":\s{2}").unwrap(); // regex for splitting timestamp entry
+    let begin       = Regex::new(r"Begin\s+(?P<action>.*)\s*$").unwrap();
+    let end         = Regex::new(r"End\s+(?P<action>.*)\s*$").unwrap();
+    let category    = Regex::new(r"\[(?P<category>.*)\]\s+(?P<activity>.*)\s*$").unwrap();
+    let do_process  = Regex::new(r"do_process").unwrap();
+    let dp_opts     = Regex::new(r"^(-d|--do-process)").unwrap();
+    
+    let mut dp: bool = false;
+
+    let mut categories: Vec<String> = Vec::new();
+
+    // Process options
+    let mut params: Vec<String> = env::args().collect();
+    if do_process.is_match(&params[0]) {
+        dp = true;
+    } else if dp_opts.is_match(&params[1]) {
+        dp = true;
+        params.remove(1);
+    };
+
+    // Process the file (stdin or file argument)
+    let input: Option<_> = Some(&params[1]);
+    let reader: Box<dyn BufRead> = match input {
+        None => Box::new(BufReader::new(io::stdin())),
+        Some(filename) => Box::new(BufReader::new(fs::File::open(filename).unwrap()))
+    };
+
+    // For each line of input (build internal data structures)
+    for line in reader.lines() {
+        // need to get the string out of line (which is an option enum)
+        let l: String = line.unwrap();
+
+        // if the line is empty or is a comment
+        if empty.is_match(&l) || comment.is_match(&l) {
+            continue
+        };
+        
+        // Parse the timestamp and entry
+        let splits: Vec<_> = delim.split(&l.trim_end()).into_iter().collect();
+        // splits should only ever have two elements (only one delimiter per log line)
+        let datetime = splits[0];
+        let entry = splits[1];
+        let date_time = NaiveDateTime::parse_from_str(datetime,"%Y-%m-%d %H:%M:%S").unwrap();
+        let timestamp = date_time.timestamp();
+
+        // Process a Begin
+        if begin.is_match(&entry) {
+            let caps = begin.captures(&entry).unwrap();
+            let action = caps.name("action").unwrap().as_str();
+            start.entry(action.to_string()).or_insert(Vec::new()).push(timestamp);
+            let cats = category.captures(&entry).unwrap();
+            let cat = cats.name("category").unwrap().as_str();
+            categories.push(cat.to_string());
+
+        };
+
+        // Process an End
+        if end.is_match(&entry) {
+            let caps = end.captures(&entry).unwrap();
+            let action = caps.name("action").unwrap().as_str();
+            finish.entry(action.to_string()).or_insert(Vec::new()).push(timestamp);
+            let cats = category.captures(&entry).unwrap();
+            let cat = cats.name("category").unwrap().as_str();
+            categories.push(cat.to_string());
+        };
+
+    }; // end for
+
+    // sort and dedup categories
+    categories.sort_unstable();
+    categories.dedup();
+
+    let mut gtoth: f64 = 0.0;
+
+    for (act, tstamps) in start.iter_mut().sorted_by_key(|x| x.0) {
+        let bc: i64 = tstamps.len().try_into().unwrap();
+        let ec: i64 = finish.get_mut(&act.to_string()).expect("Somehow, not a vector!").len().try_into().unwrap();
+
+        // Debugging
+        // println!("bc: {}, ec: {}", bc, ec);
+        // This block ensures the lengths of start and finish for this action are equal
+        if bc - ec > 1 {
+            panic!("ERROR:  Missing more than one End");  // need to fix log file
+        } else if bc > ec {  // bc should be exactly one greater
+            tstamps.pop();
+        } else if ec > bc {
+            panic!("ERROR:  Missing a Begin");  // need to fix log file
+        };
+
+        // Debugging
+        //for t in tstamps.into_iter() {
+        //    print!("{} ", t);
+        //};
+        //println!();
+        //for t in finish.get_mut(&act.to_string()).expect("Somehow, not a vector!").into_iter() {
+        //    print!("{} ", t);
+        //};
+        //println!();
+
+
+        let mut delta: i64 = 0;
+        for i in 0..tstamps.len() {
+            let beg = tstamps[i];
+            let en  = finish.get_mut(&act.to_string()).unwrap()[i];
+            delta += en - beg;
+        };
+
+        ind.insert(act.to_string(), delta);
+        let d: f64 = nearest(delta as f64 / 3600.00);
+        if d == 0.0 {
+            gtoth += 0.08;
+        } else {
+            gtoth += d;
+        };
+
+    }
+
+    // print the output
+    if dp {
+        let mut running_total: f64 = 0.0;
+        for cat in categories {
+            let mut subtotal: f64 = 0.0;
+            let catre = Regex::new(&format!(r"\[{}\]\s+.*\s*$", cat).to_string()).unwrap();
+            for (act, duration) in ind.iter().sorted_by_key(|x| x.0) {
+               if ! catre.is_match(&act.to_string()) {
+                   continue
+               };
+               let mut f: f64 = nearest(*duration as f64/3600.00);
+               if f == 0.0 {
+                   f = 0.08;
+               };
+               let fhrs: String = format!("{:.2}hrs", f);
+               println!("{}", format!("{:<75}{:>10}", act.to_string(), fhrs.to_string()));
+               subtotal += f;
+            };
+            running_total += subtotal;
+            println!();
+            println!("{}", format!("{:<20}{:.2}hrs", "Section total:", subtotal));
+            println!("{}", format!("{:<20}{:.2}hrs", "Subtotal:", running_total));
+            println!();
+            println!();
+        };
+    } else {
+        for (act, duration) in ind.iter().sorted_by_key(|x| x.0) {
+            let f: f64 = nearest(*duration as f64/3600.00);
+            let mut fhrs: String = format!("{:2}hrs", 0.08);
+            if f > 0.0 {
+                fhrs = format!("{:.2}hrs", f);
+            };
+            println!("{}", format!("{:<75}{:>10}", act.to_string(), fhrs.to_string()));
+        };
+    };
+
+    println!();
+
+    println!("{}", format!("Grand total: {:.2}", gtoth));
+}
+
+fn nearest(hr: f64) -> f64 {
+   let t = hr * 4.0;
+   t.round() / 4.0
+}